Product Description

The SOUL Bolt-On Resonated Turn Down Exhaust Tips are a track-focused solution for Porsche 991.1 and 991.2 GT3 / GT3 RS models and the 911R, designed to help reduce measured exhaust sound at circuits and autocross events with increasingly strict noise limits.

Rather than relying on simple downward-facing tips alone, SOUL incorporates straight-through stainless-steel race resonators into the replacement tip assembly. This combination reduces exhaust sound while maintaining a large, unrestricted flow path intended to minimize any effect on engine performance.

The removable turn-down outlets are attached to the resonators with V-band clamps, allowing them to be quickly loosened and rotated so exhaust can be directed away from trackside sound-monitoring equipment.

SOUL measured a 3–4 dB reduction during one real-world test at 50 feet under wide-open throttle above 7,000 RPM compared with the standard exhaust tips. Actual sound reduction will vary substantially depending on exhaust configuration, measurement distance, microphone angle, weather, track layout, and other conditions.

The complete assembly bolts directly to the factory center muffler—or an aftermarket exhaust that accepts the factory tip mounting plate—and can be swapped on and off in minutes at the track.

FITMENT:

• Fits 2014–2016 Porsche 991.1 911 GT3

• Fits 2016 Porsche 991.1 911 GT3 RS

• Fits 2016 Porsche 911R

• Fits 2018–2019 Porsche 991.2 911 GT3

• Fits 2018–2019 Porsche 991.2 911 GT3 Touring

• Fits 2019 Porsche 991.2 911 GT3 RS

• SOUL specifies fitment for all Porsche 991.1 / 991.2 GT3 and GT3 RS models including the 911R from 2014–2019

• Fits vehicles using the factory Porsche center muffler

• Fits applicable aftermarket center mufflers or bypass systems that retain the factory exhaust-tip mounting interface

DETAILS:

• Track-oriented sound-reduction exhaust-tip assembly

• Designed to help vehicles comply with restrictive track sound limits

• Incorporates straight-through race resonators

• Includes removable / adjustable turn-down outlets

• Turn-down tips attach using V-band clamps

• Turn-down outlets can be rotated to direct exhaust away from sound-monitoring equipment

• Turn-down outlets are optional to run

• Resonated assembly can be used without the turn-down outlets installed

• Minimum internal piping diameter of approximately 61 mm

• Factory center-muffler exit openings measure approximately 59–60 mm

• SOUL designed the system to minimize restriction compared with the factory exhaust outlet

• SOUL reports little to no performance impact from the straight-through resonator design

• Real-world testing recorded a 3–4 dB reduction in one specific test configuration

• Factory tip assembly attaches with only three nuts

• Designed for rapid installation and removal at the track

• No cutting required

• No welding required

• No ECU calibration required

• No modification to catalytic converters

• No modification to oxygen sensors

• No modification to exhaust valves

• Bracket components are precision laser cut

• Brackets are hand finished

• V-band clamps included

• SOUL race resonators use full stainless-steel construction

• Designed for repeated track use

• Backed by SOUL Performance Products' Lifetime Warranty for street and track use

DEVELOPED FOR TRACK SOUND LIMITS:

Sound restrictions have become increasingly common at race tracks throughout the United States and internationally.

Highly modified GT3s can exceed those limits, and at particularly restrictive facilities even otherwise stock vehicles may encounter difficulty passing sound checks.

SOUL developed this system after receiving requests from customers participating at venues and events including:

• Lime Rock Park

• WeatherTech Raceway Laguna Seca

• Circuit Mont-Tremblant

• SCCA Autocross events

The goal was to create a solution that could be quickly installed at the track without permanently changing the vehicle's normal exhaust configuration.

MORE THAN A SIMPLE TURN-DOWN:

A conventional turn-down tip attempts to reduce measured sound primarily by redirecting exhaust energy toward the ground or away from a sound meter.

SOUL found that simple turn-down outlets may not provide sufficient reduction in every situation.

The Resonated Turn Down system therefore combines two strategies:

Straight-Through Race Resonators

These attenuate exhaust sound while maintaining a relatively unrestricted flow path.

Directional Turn-Down Outlets

These allow exhaust to be directed downward or away from trackside sound-monitoring equipment.

The result is a more comprehensive sound-management solution than a basic slip-on turn-down tip.

STRAIGHT-THROUGH RACE RESONATORS:

The integrated SOUL race resonators are designed around a straight-through internal flow path.

The minimum inside diameter is approximately:

61 mm

For comparison, SOUL measured the factory center muffler's outlet openings at approximately:

59–60 mm

The resonated assembly therefore maintains an internal diameter comparable to or slightly larger than the factory center-muffler outlets.

This allows the resonators to attenuate sound without introducing a dramatically smaller exhaust restriction.

REAL-WORLD SOUND TESTING:

SOUL documented one test using a Porsche running:

• Factory headers

• Factory side mufflers

• Aftermarket center muffler bypass

At approximately:

50 feet

under:

Wide-open throttle above 7,000 RPM

SOUL measured approximately:

3–4 dB less sound

with the Resonated Turn Down Exhaust Tips compared with the standard exhaust tips.

A 3–4 dB reduction can be meaningful at a track where a vehicle is operating close to the venue's maximum allowable sound level.

SOUND REDUCTION IS NOT GUARANTEED:

SOUL specifically warns that a fixed amount of sound reduction cannot be guaranteed.

Sound measurements are affected by many factors, including:

• Distance from the microphone

• Microphone angle

• Exhaust configuration

• Headers

• Catalytic converters

• Center muffler configuration

• Side muffler configuration

• Engine load

• Engine RPM

• Vehicle speed

• Surrounding terrain

• Buildings and reflective surfaces

• Weather conditions

• Track measurement procedure

The documented 3–4 dB result should therefore be treated as a specific real-world test result rather than a guaranteed reduction for every car or venue.

PROVEN TRACK APPLICATION:

SOUL also reports that the Resonated Turn Down Exhaust Tips have been used with a factory exhaust to meet strict sound restrictions at Bilster Berg Circuit in Germany.

This demonstrates that the system can be useful even for vehicles that are not running an aggressively modified exhaust.

ADJUSTABLE TURN-DOWN DIRECTION:

The turn-down outlets are attached to the resonators using V-band clamps.

Unlike conventional slip-on turn-downs that can become difficult to reposition after repeated heat cycles, the V-band design allows the outlet to be loosened and rotated when necessary.

This gives the driver or crew the ability to orient the exhaust outlets:

• Downward

• Away from a trackside microphone

• Away from a specific sound-control station

The appropriate orientation will depend on the track's sound-measurement location and procedure.

TURN-DOWNS ARE REMOVABLE:

The directional turn-down outlets themselves are optional.

They can be removed while leaving the straight-through resonated assembly installed.

This gives the owner additional flexibility depending on:

• Track sound requirements

• Exhaust configuration

• Desired sound level

• Outlet direction requirements

QUICK TRACKSIDE SWAP:

The factory exhaust-tip assembly is held in place with only three nuts.

SOUL designed the Resonated Turn Down Exhaust Tips around the same mounting architecture, allowing the assemblies to be exchanged quickly.

This makes it practical to:

• Drive to the track with standard tips

• Install the resonated turn-down assembly before going on circuit

• Run the sound-restricted event

• Reinstall the normal tips afterward

The system therefore does not require the owner to permanently compromise the vehicle's normal appearance or exhaust sound.

FACTORY CENTER MUFFLER COMPATIBILITY:

The assembly bolts directly to the factory Porsche center muffler.

No modification to the center muffler is required.

The original:

• Side mufflers

• Exhaust valves

• Headers

• Catalytic converters

• Oxygen sensors

can remain untouched.

AFTERMARKET EXHAUST COMPATIBILITY:

The Resonated Turn Down Tips can also be used with an aftermarket muffler or center-muffler bypass that accepts the factory Porsche exhaust-tip mounting plate.

This makes the system compatible with a range of exhaust combinations without requiring a dedicated version for each downstream exhaust configuration.

Fitment should be verified if the aftermarket exhaust replaces or alters the factory tip mounting interface.

WITH SOUL CENTER MUFFLER BYPASS:

The product is particularly useful on vehicles equipped with an aggressive center-muffler bypass.

A Center Muffler Bypass substantially increases exhaust volume and may create problems at sound-restricted tracks.

The Resonated Turn Down Tips provide a temporary way to reduce measured output while retaining the performance-oriented center-muffler configuration.

WITH FACTORY EXHAUST:

Even vehicles retaining the factory Porsche exhaust can encounter restrictive sound limits at certain circuits.

The Resonated Turn Down system can be installed on the factory center muffler without requiring any other exhaust modification.

PERFORMANCE IMPACT:

SOUL engineered the system specifically to reduce sound while minimizing exhaust restriction.

The resonators use a straight-through design, and the system's minimum internal diameter is approximately:

61 mm

compared with approximately:

59–60 mm

at the factory center-muffler exits.

SOUL therefore reports little to no impact on performance from the resonated assembly.

No specific horsepower-loss figure is published, so DasMotoring does not advertise a numerical power change.

CONSTRUCTION:

The system is intended to withstand repeated installation, removal, heat cycling, and track use.

Construction includes:

• Full stainless-steel race resonators

• Laser-cut bracket components

• Hand-finished brackets

• V-band-mounted turn-down outlets

• Included V-band clamps

The V-band attachment is particularly useful for a component expected to be adjusted or removed repeatedly at track events.

NO ECU TUNING REQUIRED:

The Resonated Turn Down Tips install at the very rear of the exhaust system.

They do not modify:

• Catalytic converters

• Oxygen sensors

• ECU calibration

• Factory exhaust valves

No ECU calibration is required for installation.

NO EMISSIONS-SYSTEM CHANGES:

This product does not remove or modify the factory emissions-control equipment.

Any emissions implications associated with the vehicle depend on the rest of the installed exhaust system rather than these resonated exhaust tips.

Porsche 991.1 / 991.2 GT3 / GT3 RS SOUL Bolt-On Exhaust Tips

from $655.00

Product Description

The SOUL Bolt-On Exhaust Tips are a direct-fit visual upgrade for Porsche 991.1 and 991.2 GT3 and GT3 RS models, replacing the factory center exhaust outlets with larger 4-inch stainless-steel tips while retaining the original center muffler.

SOUL offers two tip profiles and three finishes, allowing owners to tailor the rear appearance without replacing the exhaust itself. Each set uses a model-specific stainless-steel backing plate engineered around the factory center-muffler mounting interface.

Importantly, GT3 and GT3 RS models use different backing plates, and the 991.2 requires longer tips than the 991.1 because of its deeper rear bumper. Selecting the correct vehicle when ordering is therefore essential for proper fitment and tip position.

Installation is completely bolt-on, requires no cutting or welding, and allows nearly 1 inch of tip-depth adjustment for precise positioning relative to the rear bumper.

FITMENT:

• Fits 2014–2016 Porsche 991.1 911 GT3

• Fits 2016 Porsche 991.1 911 GT3 RS

• Fits 2018–2019 Porsche 991.2 911 GT3

• Fits 2018–2019 Porsche 991.2 911 GT3 Touring

• Fits 2019 Porsche 991.2 911 GT3 RS

• Designed for vehicles using the factory Porsche center muffler

• Also compatible with applicable aftermarket exhaust systems designed to accept the factory-style GT3 tip mounting plate

• GT3 and GT3 RS use different mounting plates

• 991.1 and 991.2 use different tip lengths

• Does not list Porsche 911R fitment

DETAILS:

• Complete bolt-on exhaust-tip assembly

• 4-inch diameter tips

• Available in two tip styles

• Available in three finishes

• Six cosmetic configurations per vehicle application

• Model-specific backing plate

• 1/8-inch-thick T304L stainless-steel backing plate

• Backing plate is precision laser cut

• Tips manufactured from .065-inch-wall stainless-steel tubing

• Direct bolt-on installation

• No cutting required

• No welding required

• No ECU calibration required

• No changes to factory catalytic converters

• No changes to factory mufflers

• No changes to factory exhaust valves

• Tip depth adjustable by approximately 1 inch

• Includes Mikalor Supra Heavy-Duty W4 clamps

• Mikalor clamps provide high clamping force and durable stainless-steel construction

• Installation can typically be performed by an experienced DIY enthusiast in under one hour

• Loose replacement tips are available separately if a different style or finish is desired later

• Custom tip configurations may be available by special request

• Backed by SOUL Performance Products' Lifetime Warranty for street and track use

MODEL-SPECIFIC CONSTRUCTION:

These are not universal 4-inch tips.

SOUL builds the assemblies around the specific center-muffler mounting arrangement used by each vehicle.

Two important differences must be accounted for:

GT3 vs. GT3 RS

The GT3 and GT3 RS use different backing plates. The correct model must therefore be selected when ordering.

991.1 vs. 991.2

The 991.2 rear bumper is deeper than the 991.1 rear bumper. SOUL compensates by supplying longer tips for the 991.2 so that the finished outlet position remains correct.

This means that generation and model should both be captured during checkout even though the tip style and finish determine the visible appearance.

4-INCH TIP CONSTRUCTION:

Each exhaust outlet is manufactured from:

4-inch-diameter stainless-steel tubing

with:

.065-inch wall thickness

The larger outlets provide a more substantial appearance than the original tips while remaining appropriately proportioned for the GT3's centrally mounted exhaust.

1/8-INCH T304L BACKING PLATE:

The exhaust tips mount to a dedicated:

1/8-inch-thick T304L stainless-steel backing plate

The backing plate is laser cut for accurate fitment to the center exhaust assembly.

Using a dedicated backing plate allows SOUL to preserve an OEM-style mounting approach rather than requiring welded or improvised exhaust-tip adapters.

ADJUSTABLE TIP DEPTH:

Tip position can be adjusted by nearly:

1 inch

during installation.

This allows the installer to fine-tune how far the outlets protrude from the rear bumper.

Adjustment can be useful for achieving:

• More recessed OEM-style positioning

• More aggressive outward positioning

• Equal left-to-right tip depth

• Correct alignment with the rear bumper

MIKALOR HEAVY-DUTY CLAMPS:

SOUL supplies Mikalor Supra Heavy-Duty W4 clamps to secure the tips to the backing plate.

These clamps feature:

• Stainless-steel construction

• Projection-welded components

• Swinging-bridge design

• High-strength stainless-steel bolt

• Captive nut and trunnion

The clamp system allows secure installation while retaining adjustability.

TIP STYLE OPTIONS:

Two different 4-inch profiles are available.

4" Slash Cut Single Wall

The outlet face is cut on an angle, producing a more aggressive appearance when viewed from the side and rear.

4" Straight Cut Single Wall

The outlet terminates perpendicular to the tubing, providing a cleaner and more traditional motorsport appearance.

TIP FINISH OPTIONS:

Each style is available in three finishes:

Signature Satin

SOUL's clean metallic satin finish.

Brushed

A directional brushed-metal appearance providing a more textured stainless-steel aesthetic.

Satin Black

A dark finish for customers wanting a more understated and aggressive appearance.

The Satin Black configuration carries a price premium.

SIGNATURE SATIN:

$655.00

Available as:

• 4" Slash Cut Single Wall

• 4" Straight Cut Single Wall

BRUSHED:

$655.00

Available as:

• 4" Slash Cut Single Wall

• 4" Straight Cut Single Wall

SATIN BLACK:

$835.00

Available as:

• 4" Slash Cut Single Wall

• 4" Straight Cut Single Wall

DIRECT BOLT-ON INSTALLATION:

SOUL designed the system for straightforward installation using basic hand tools.

Installation involves:

• Removing the original factory exhaust-tip assembly

• Installing the appropriate SOUL backing plate

• Installing the selected 4-inch tips

• Adjusting tip depth

• Tightening the supplied clamps

There is:

• No cutting

• No welding

• No permanent modification

• No ECU programming

SOUL states that most experienced DIY enthusiasts can complete installation in under one hour.

COSMETIC UPGRADE:

This product is primarily an appearance modification.

It does not replace the vehicle's:

• Headers

• Catalytic converters

• Center muffler

• Side mufflers

• Exhaust valves

• Oxygen sensors

Installing the tips alone should therefore not create a meaningful horsepower or torque change.

NO EFFECT ON FACTORY VALVE OPERATION:

Because the factory muffler and exhaust-valve assemblies remain unchanged, installing these tips does not alter Porsche's exhaust-valve operation.

The vehicle retains its normal factory exhaust-control functionality.

NO ECU TUNING REQUIRED:

The tips are installed downstream of all engine-management and emissions-related components.

No ECU calibration is required.

The tips themselves do not alter catalyst monitoring or oxygen-sensor operation.

CUSTOM CONFIGURATIONS:

SOUL indicates that custom tip configurations can be produced by request.

For customers looking for something outside the standard:

• Slash Cut

• Straight Cut

• Signature Satin

• Brushed

• Satin Black

combinations, custom options should be discussed before ordering.

Product Description

The SOUL Support Brackets are purpose-built for Porsche 991.1 and 991.2 GT3 / GT3 RS models and the 911R running SOUL's complete Modular Competition Exhaust configuration.

When the factory center muffler and both factory side mufflers are removed simultaneously, the original muffler assemblies—and the exhaust support structure associated with them—are also eliminated. SOUL developed these dedicated brackets to restore proper support for the Center Muffler Bypass when it is used together with SOUL Side Muffler Bypass Pipes.

The brackets mount from the vehicle's original factory side-muffler mounting locations to the SOUL Center Muffler Bypass Exhaust, helping support the exhaust assembly while reducing vibration, movement, NVH, and unnecessary mechanical loading on the remaining exhaust connections.

Each bracket is laser cut, press-brake bent, and hand assembled, and the kit includes two Mikalor Supra Heavy-Duty W4 clamps for secure attachment.

FITMENT:

• Fits 2014–2016 Porsche 991.1 911 GT3

• Fits 2016 Porsche 991.1 911 GT3 RS

• Fits 2016 Porsche 911R

• Fits 2018–2019 Porsche 991.2 911 GT3

• Fits 2018–2019 Porsche 991.2 911 GT3 with Touring Package

• Fits 2019 Porsche 991.2 911 GT3 RS

• SOUL specifies fitment for all Porsche 991.1 / 991.2 GT3 and GT3 RS models including the 911R from 2014–2019

• Designed specifically for vehicles using a SOUL Center Muffler Bypass Exhaust together with SOUL Side Muffler Bypass Pipes

• Compatible with both the Valved and Non-Valved Modular Competition Exhaust configurations

DETAILS:

• Dedicated exhaust-support bracket kit

• Designed specifically for SOUL's Modular Competition Exhaust architecture

• Required when the factory center muffler and side mufflers are removed together

• Supports the SOUL Center Muffler Bypass Exhaust

• Uses the original Porsche side-muffler mounting locations

• Helps restore structural support lost when the factory muffler assemblies are deleted

• Helps reduce exhaust movement

• Helps reduce vibration

• Helps reduce NVH

• Helps reduce unnecessary stress on exhaust joints and clamps

• Each bracket is laser cut

• Each bracket is press-brake bent

• Each bracket is hand assembled

• Includes two Mikalor Supra Heavy-Duty W4 clamps

• Mikalor clamps use projection-welded construction

• Swinging-bridge clamp design

• High-strength stainless-steel bolts

• Captive-nut and trunnion design

• Designed for high clamping force and long-term durability

• No performance tuning required

• No ECU calibration required

• No exhaust-tip options

• No valve-specific variant

• Backed by SOUL Performance Products' Lifetime Warranty for street and track use

WHY ARE THESE BRACKETS REQUIRED?

The factory 991 GT3 exhaust system uses its center and side muffler assemblies as part of the overall exhaust-support structure.

Installing only one type of bypass allows portions of that original architecture to remain.

However, when both the:

Factory Center Muffler

and

Factory Side Mufflers

are removed simultaneously, the original exhaust supports disappear with them.

Without an appropriate replacement support system, the remaining exhaust components would have to rely too heavily on:

• Exhaust clamps

• Pipe connections

• Flex sections

• Header connections

• Other mounting points not intended to carry the complete load

SOUL's Support Brackets restore a dedicated mechanical load path between the chassis and the Center Muffler Bypass.

DESIGNED FOR THE MODULAR COMPETITION EXHAUST:

These brackets were developed specifically for SOUL's Modular Competition Exhaust Package.

That complete system combines:

• SOUL Center Muffler Bypass Exhaust

• SOUL Side Muffler Bypass Pipes

• SOUL Support Brackets

The resulting system removes all three factory muffler assemblies while maintaining proper exhaust support.

NOT NEEDED FOR CENTER MUFFLER BYPASS ALONE:

If the vehicle is running the SOUL Center Muffler Bypass while retaining the original Porsche side mufflers, the factory side-muffler mounting architecture remains in place.

In that configuration, this additional bracket kit is not required.

NOT NEEDED FOR SIDE MUFFLER BYPASS ALONE:

Likewise, when SOUL Side Muffler Bypass Pipes are installed while retaining the original Porsche center muffler, the factory center-muffler support architecture remains available.

The dedicated Modular Competition Support Brackets become necessary when the center and side mufflers are deleted together.

FACTORY MOUNTING LOCATIONS:

SOUL designed the brackets to mount from the original factory side-muffler mounting locations.

The brackets then extend inward to support the SOUL Center Muffler Bypass assembly.

Using existing chassis mounting points allows SOUL to add the necessary support without requiring permanent structural modification to the vehicle.

NVH REDUCTION:

Properly supporting an exhaust system is about more than simply preventing it from falling or moving excessively.

An inadequately supported exhaust can transmit additional:

• Vibration

• Resonance

• Buzzing

• Rattling

• Mechanical noise

into the chassis and cabin.

SOUL specifically developed these brackets to help reduce NVH and in-cabin presence when running the complete Modular Competition Exhaust configuration.

EXHAUST DURABILITY:

Additional support also helps reduce mechanical loading on exhaust components.

Properly distributing the exhaust's mass can reduce stress on:

• Clamp interfaces

• Exhaust tubing

• Welds

• Flex sections

• Header connections

• Adjacent exhaust components

This becomes especially important during track use, where exhaust components are exposed to repeated heat cycles, vibration, chassis movement, and high-G loading.

LASER-CUT CONSTRUCTION:

Each support bracket begins as a precision laser-cut component.

Laser cutting provides repeatable bracket geometry and accurate mounting features before forming and final assembly.

PRESS-BRAKE FORMED:

After cutting, the brackets are press-brake bent into their final shape.

This manufacturing process provides controlled bends and consistent geometry while avoiding the variability associated with manually forming each component.

HAND ASSEMBLED:

SOUL then hand assembles the bracket kit before shipment.

The finished brackets are designed specifically around the mounting geometry of the 991 GT3 exhaust system and SOUL's Center Muffler Bypass.

MIKALOR SUPRA HEAVY-DUTY W4 CLAMPS:

The kit includes:

Two Mikalor Supra Heavy-Duty W4 Clamps

These clamps incorporate:

• Projection-welded construction

• Swinging-bridge architecture

• High-strength stainless-steel bolts

• Captive nut

• Trunnion design

The heavy-duty clamps provide the clamping force and durability required to secure the support system to the exhaust assembly.

VALVED & NON-VALVED COMPATIBILITY:

The Support Brackets are not specific to the valve configuration.

They can be used with:

SOUL Valved Side Muffler Bypass Pipes

or

SOUL Non-Valved Side Muffler Bypass Pipes

when either system is combined with the SOUL Center Muffler Bypass.

There is therefore only one bracket SKU.

NO PERFORMANCE OR SOUND CHANGE:

The Support Brackets are structural components.

Installing them does not directly change:

• Horsepower

• Torque

• Exhaust flow

• Exhaust volume

• Exhaust tone

• Valve operation

Their purpose is to properly support the complete Modular Competition Exhaust and minimize unwanted movement and NVH.

EMISSIONS:

The Support Brackets do not modify any emissions-control components.

They do not alter:

• Catalytic converters

• Oxygen sensors

• Headers

• ECU programming

• Exhaust-valve controls

Emissions compliance depends entirely on the exhaust components installed with them.

Product Description

The SOUL Modular Competition Exhaust Package is a complete, highly configurable muffler-delete solution for Porsche 991.1 and 991.2 GT3 / GT3 RS models and the 911R, combining SOUL's Side Muffler Bypass Pipes, Center Muffler Bypass Exhaust, and purpose-built support brackets into one lightweight package.

Rather than locking the car into a single exhaust configuration, SOUL designed the system to be modular. Owners can run the complete Competition configuration with both the center and side mufflers removed, reinstall the factory center muffler while retaining SOUL's Side Muffler Bypass Pipes, or reinstall the factory side mufflers while using only the SOUL Center Muffler Bypass.

The complete package removes approximately 46 lbs in the valved configuration or approximately 49 lbs in the non-valved configuration, substantially reducing mass and heat at the extreme rear of the vehicle.

The Valved configuration retains factory Porsche exhaust-valve control for meaningful sound adjustment, while the Non-Valved configuration prioritizes minimum weight, simplicity, and consistent aggressive exhaust character.

FITMENT:

• Fits 2014–2016 Porsche 991.1 911 GT3

• Fits 2016 Porsche 991.1 911 GT3 RS

• Fits 2016 Porsche 911R

• Fits 2018–2019 Porsche 991.2 911 GT3

• Fits 2018–2019 Porsche 991.2 911 GT3 with Touring Package

• Fits 2019 Porsche 991.2 911 GT3 RS

• SOUL specifies fitment for all 991.1 / 991.2 GT3 and GT3 RS models including the 911R from 2014–2019

• Compatible with factory headers and catalytic converters

• Compatible with applicable SOUL Street Headers

• Compatible with SOUL Competition Headers

• Available in Valved and Non-Valved configurations

PACKAGE INCLUDES:

• SOUL Center Muffler Bypass Exhaust

• SOUL Side Muffler Bypass Pipes

• Valved Side Muffler Bypass Pipes when the Valved configuration is selected

• Non-Valved Side Muffler Bypass Pipes when the Non-Valved configuration is selected

• Purpose-built SOUL exhaust support brackets

• Required heavy-duty mounting clamps

• AccuSeal connections where applicable

• Vacuum-line plugs for the Non-Valved configuration

• Selected 4-inch exhaust tips

DETAILS:

• Complete modular Competition exhaust package

• Removes the factory center muffler

• Removes both factory side mufflers when installed in full Competition configuration

• Allows individual factory muffler components to be reinstalled later

• Three usable exhaust configurations from one package

• Available Valved

• Available Non-Valved

• Valved configuration retains factory PSE / exhaust-valve control

• Non-Valved configuration eliminates exhaust-valve functionality

• Approximately 46 lbs of weight savings with the Valved configuration

• Approximately 49 lbs of weight savings with the Non-Valved configuration

• Significant reduction in mass at the extreme rear of the vehicle

• Reduces engine-bay heat retention

• Helps reduce heat soak toward the rear tires

• Designed to maintain reasonable cabin presence despite aggressive exterior sound

• Center Muffler Bypass incorporates an expansion-chamber acoustic design

• Valved system uses a reduced-flow path when closed to meaningfully lower exterior volume

• Constructed from mandrel-bent T304L stainless steel

• Includes Mikalor Supra Heavy-Duty W4 clamps

• Includes dedicated support brackets required when both factory muffler assemblies are removed

• No cutting required

• No welding required

• No ECU calibration required for the exhaust package itself

• No catalyst modification required

• No oxygen-sensor relocation required with factory headers

• SOUL reports no check engine lights associated with this system

• Six exhaust-tip choices per valve configuration

• Twelve total sellable configurations

• Backed by SOUL's Lifetime Warranty for street and track use

3-IN-1 MODULAR DESIGN:

The key advantage of this package is its ability to operate in multiple configurations.

Purchasing the complete package gives the owner:

1. Full Modular Competition Exhaust

SOUL Side Muffler Bypass Pipes + SOUL Center Muffler Bypass Exhaust

This removes all three factory muffler assemblies for maximum weight reduction and aggressive sound.

2. Side Muffler Bypass Configuration

SOUL Side Muffler Bypass Pipes + Factory Center Muffler

This prioritizes major weight reduction and heat management while retaining the original Porsche center muffler.

3. Center Muffler Bypass Configuration

Factory Side Mufflers + SOUL Center Muffler Bypass

This produces a more traditional GT3 center-muffler-delete sound while retaining the factory side mufflers and their associated sound-control characteristics.

The system can therefore be adjusted as the owner's track requirements, sound preferences, or driving environment change.

FULL COMPETITION CONFIGURATION:

When all components in the package are installed, the factory:

• Left side muffler

• Right side muffler

• Center muffler

are removed.

This creates a substantially freer exhaust path and removes a large amount of mass from the rear of the vehicle.

The complete system is intended for drivers prioritizing:

• Aggressive naturally aspirated sound

• Major weight reduction

• Reduced rear exhaust heat

• Track-oriented character

• Modular adjustability

PURPOSE-BUILT SUPPORT BRACKETS:

Removing both the factory side mufflers and center muffler also removes the original support architecture associated with those components.

SOUL therefore developed dedicated support brackets specifically for the complete Modular Competition Exhaust.

The brackets connect the remaining vehicle-side mounting locations to the SOUL Center Muffler Bypass and provide the structural support necessary when the original muffler assemblies are no longer installed.

The support system is also designed to help reduce:

• Exhaust vibration

• NVH

• Unnecessary stress on the exhaust assembly

The brackets are a critical part of the complete Competition configuration rather than an optional cosmetic component.

VALVED CONFIGURATION:

The Valved Modular Competition Exhaust retains the vehicle's factory Porsche exhaust-valve control.

This provides a level of sound adjustment despite the elimination of all three factory mufflers.

With the valves closed, SOUL routes 100% of the exhaust through the smaller-diameter secondary path before it enters the expansion-chamber section of the Center Muffler Bypass.

This produces a noticeable reduction in exterior sound.

The difference is less dramatic inside the cabin because the overall exhaust system remains considerably less muffled than stock, but the factory valve control still provides meaningful flexibility.

VALVES OPEN:

With the valves open, the Valved package provides its freer-flowing performance path.

Expect:

• Dramatically increased naturally aspirated flat-six sound

• Stronger mechanical engine character

• Greater throttle-related presence

• Aggressive downshifts

• Strong high-RPM wail

• Race-oriented exterior volume

• Much greater sound than the factory Porsche exhaust

• Full use of the modular muffler-delete architecture

VALVES CLOSED:

Closing the valves redirects exhaust through SOUL's quieter secondary route.

Expect:

• Noticeably lower exterior volume

• Reduced harshness

• More controlled exhaust character

• Reduced sound during neighborhood driving

• Useful sound reduction for pit-lane or track situations where applicable

• Less dramatic cabin change than the exterior change

The Valved system is therefore the better configuration for customers who want the full Competition package without completely abandoning exhaust-volume control.

NON-VALVED CONFIGURATION:

The Non-Valved package eliminates valve hardware entirely.

It provides:

• Permanently aggressive exhaust operation

• Simplified exhaust architecture

• Minimum possible package weight

• Approximately 3 lbs greater weight savings than the Valved system

• No quiet mode

• No factory PSE adjustment

• Constant performance-oriented sound

SOUL includes plugs for the unused vacuum lines when the Non-Valved configuration is selected.

WEIGHT SAVINGS:

The Modular Competition Exhaust provides some of the largest exhaust-related weight savings available for the 991 GT3 platform.

Valved Configuration:

Approximately 46 lbs of weight savings

Non-Valved Configuration:

Approximately 49 lbs of weight savings

The Non-Valved configuration therefore saves approximately:

3 additional pounds

compared with the Valved package.

Because the removed components sit at the extreme rear of the vehicle, the reduction is especially valuable on the rear-engined 911 platform.

HEAT MANAGEMENT:

Removing the factory side mufflers eliminates two large heat-retaining components surrounding the rear of the vehicle.

SOUL specifically developed the Side Muffler Bypass architecture to help:

• Reduce engine-bay heat soak

• Reduce exhaust-system thermal mass

• Reduce heat exposure toward the rear tires

• Improve thermal recovery between track sessions

This makes the package particularly attractive for cars subjected to extended high-load driving.

REASONABLE CABIN PRESENCE:

A complete center- and side-muffler-delete system could easily become objectionable inside the cabin if acoustic behavior were ignored.

SOUL specifically developed the Center Muffler Bypass's expansion-chamber design to reduce:

• Drone

• Vibration

• Low-frequency cabin resonance

SOUL describes the resulting package as having unusually reasonable cabin presence for such an aggressive straight-through GT3 exhaust configuration.

This does not mean the system is quiet.

The Modular Competition Exhaust is an aggressive system, but it is designed to avoid simply maximizing every undesirable frequency along with overall volume.

SOUND CHARACTER:

Expect:

• Dramatically increased flat-six presence

• Greater mechanical engine sound

• Aggressive idle and low-RPM character

• Increased throttle-related sound

• Stronger downshift presence

• Increased race-derived tone

• Much greater high-RPM intensity

• Naturally aspirated GT3 wail approaching redline

• Significantly increased exterior volume

The exact sound character can be changed by taking advantage of the system's modularity and reinstalling either the factory center or factory side mufflers.

MODULAR SOUND ADJUSTMENT:

If the complete package becomes too aggressive for a particular track, street environment, or trip, the owner is not locked into the full muffler-delete configuration.

The modular architecture allows the factory:

Center Muffler

or

Side Mufflers

to be reintroduced.

This lets the owner experiment with different combinations of:

• Sound volume

• Exhaust tone

• Weight

• Cabin presence

• Valve behavior

without purchasing another complete exhaust system.

WITH FACTORY CENTER MUFFLER:

Reinstalling the factory center muffler while retaining the SOUL Side Muffler Bypass Pipes provides:

• Major side-muffler weight reduction

• Reduced rear heat

• Retained factory center-muffler attenuation

• More exotic and controlled exhaust tone

• Reduced overall volume compared with the full Competition configuration

The Valved Side Muffler Bypass version also retains factory valve functionality in this arrangement.

WITH FACTORY SIDE MUFFLERS:

Reinstalling the original Porsche side mufflers while retaining the SOUL Center Muffler Bypass provides:

• Approximately 11 lbs of center-muffler weight reduction

• Deeper and more aggressive exhaust sound

• Factory side-muffler attenuation

• Factory valve functionality where applicable

• Greater sound control than the complete Non-Valved Competition configuration

FACTORY PSE CONTROL:

When the Valved package is selected, SOUL retains the factory Porsche Sport Exhaust control functionality.

The existing PSE control continues commanding the exhaust valves.

No separate aftermarket valve controller is required for the Valved package.

The Non-Valved package does not retain this functionality.

EXHAUST TIP FITMENT:

The Modular Competition Exhaust uses interchangeable 4-inch single-wall exhaust tips.

Two styles are available:

4" Slash Cut Single Wall

An angled outlet for a more aggressive appearance.

4" Straight Cut Single Wall

A traditional straight-cut circular outlet.

Each is offered in:

• Signature Satin

• Brushed

• Satin Black

SOUL accounts for the difference in bumper depth between the 991.1 and 991.2 chassis when supplying the appropriate tip configuration.

991.1 VS. 991.2 TIP LENGTH:

The 991.2 rear bumper has a different depth than the 991.1.

SOUL therefore uses longer exhaust tips for 991.2 applications to position the outlets correctly relative to the bumper.

Customers should provide the correct vehicle generation when ordering so the appropriate tip configuration is supplied.

DIRECT BOLT-ON INSTALLATION:

SOUL designed the package as a bolt-on system.

Installation requires:

• Removal of the factory center muffler

• Removal of both factory side mufflers

• Installation of the SOUL Side Muffler Bypass Pipes

• Installation of the SOUL Center Muffler Bypass Exhaust

• Installation of the dedicated support brackets

• Installation and alignment of the selected exhaust tips

There is:

• No cutting

• No welding

• No permanent modification to the vehicle

SOUL describes installation as straightforward enough for experienced DIY enthusiasts.

CHECK ENGINE LIGHT:

The Modular Competition Exhaust is installed downstream of the factory oxygen sensors.

With factory header architecture retained, the oxygen sensors remain in the headers and are not affected by removal of the center and side mufflers.

SOUL states that no check engine lights are associated with this system.

The package itself therefore does not require ECU calibration simply for installation.

This should not be confused with installing separate catless Competition Headers, which introduces different emissions and diagnostic considerations.

WITH SOUL STREET HEADERS:

Pairing the Modular Competition Exhaust with SOUL Street Headers creates an extremely aggressive catted complete exhaust configuration.

This combines:

• High-flow performance catalysts

• Upgraded header architecture

• Complete center- and side-muffler bypass

• Major rear weight reduction

• Strong naturally aspirated sound

• Modular exhaust configuration

WITH SOUL COMPETITION HEADERS:

Pairing the package with SOUL Competition Headers creates one of the most aggressive exhaust configurations available for the platform.

This combination removes:

• Factory catalytic converters

• Factory side mufflers

• Factory center muffler

and provides:

• Maximum exhaust flow

• Maximum exhaust sound

• Major exhaust-system weight reduction

• Track-oriented engine character

• Reduced rear exhaust heat

Applicable ECU calibration and emissions considerations should be addressed separately when using catless headers.

PERFORMANCE:

The Modular Competition Exhaust reduces downstream exhaust restriction and substantially decreases vehicle mass.

However, SOUL does not publish a controlled standalone horsepower or torque gain for this package.

The primary verified benefits are:

• Approximately 46–49 lbs of weight savings

• Increased exhaust flow

• Increased naturally aspirated sound

• Reduced rear heat retention

• Modular sound adjustment

• Optional factory valve functionality

EMISSIONS NOTE:

When used with the original Porsche headers and catalytic converters, the Modular Competition Exhaust does not remove the vehicle's factory catalyst assemblies or oxygen sensors.

The package modifies exhaust components downstream of the emissions-control hardware.

Customers using separate aftermarket headers or catalyst-delete components are responsible for determining the emissions compliance of their complete vehicle configuration.

Porsche 991.1 / 991.2 GT3 / GT3 RS / 911R SOUL Competition Headers

$5,495.00

Product Description

The SOUL Competition Headers are a complete catless long-tube header system engineered for Porsche 991.1 and 991.2 GT3 / GT3 RS models, the 911R, and the 991.2 GT3 Cup.

SOUL replaces the restrictive factory header and catalytic-converter assemblies with long-tube runners, smooth-radius large-diameter bends, billet CNC-machined head flanges, and purpose-built billet merge collectors with merge spikes. The system is designed to improve exhaust scavenging, throttle response, high-RPM breathing, and naturally aspirated flat-six sound while eliminating the restriction created by the factory catalytic converters.

Unlike a conventional fabricated or slip-on collector, SOUL machines its merge collector from billet stainless steel. This allows optimized internal geometry, increased primary-runner length, fewer welded joints, and a leak-resistant connection designed for repeated hard track use.

Independent Dynojet testing on an otherwise stock 991.2 GT3 RS showed gains throughout the upper power band, including approximately +24.4 whp at 8,400 RPM and maximum torque improvements exceeding 26 lb-ft.

FITMENT:

• Fits 2014–2016 Porsche 991.1 911 GT3

• Fits 2016 Porsche 991.1 911 GT3 RS

• Fits 2016 Porsche 911R

• Fits 2018–2019 Porsche 991.2 911 GT3

• Fits 2018–2019 Porsche 991.2 911 GT3 with Touring Package

• Fits 2019 Porsche 991.2 911 GT3 RS

• Fits Porsche 991.2 GT3 Cup

• SOUL specifies fitment for all 991.1 / 991.2 GT3 and GT3 RS models, including the 911R and 991.2 GT3 Cup

• Direct replacement for the factory header and catalyst assemblies

• Compatible with the factory downstream exhaust system

• Compatible with applicable SOUL center and side-muffler exhaust upgrades

DETAILS:

• Complete Long Tube Competition Header system

• Completely catless

• Removes the factory catalytic converters

• Long-tube primary-runner architecture

• Smooth-radius, large-diameter bends

• Optimized cylinder-head-to-primary transition

• Performance-oriented collectors with integrated merge spikes

• Bespoke billet CNC-machined merge collectors

• Billet collector design maximizes available primary-runner length

• Billet collector eliminates several conventional fabricated weld joints

• Slip-on merge collectors deliberately avoided to reduce the possibility of exhaust leaks

• Billet 304L stainless-steel head flanges

• Billet 304L stainless-steel merge collectors

• Head flanges and collectors precision machined using 5-axis CNC equipment

• Constructed from mandrel-bent .065-inch-wall T304L stainless steel

• Back-purged TIG welded

• ARCAL Prime argon used during welding

• Designed to increase exhaust flow

• Designed to improve throttle response

• Designed to increase naturally aspirated power

• Produces a substantially more aggressive flat-six exhaust note

• Developed for aggressive street and track use

• Thick-gauge aluminum fabrication fixtures minimize welding distortion

• Every set undergoes rigorous quality-control inspection before shipment

• Foam-packed following final inspection

• Optional Jet-Hot ceramic coating available by special order

• Backed by SOUL Performance Products' Lifetime Warranty for street and track use

CATLESS LONG-TUBE DESIGN:

The factory GT3 exhaust manifolds must satisfy requirements beyond outright performance, including:

• Emissions compliance

• Catalyst packaging

• Noise regulations

• Mass-production requirements

• Manufacturing cost

• Durability targets

These compromises restrict primary-runner length, runner diameter, and collector geometry.

SOUL's Competition Headers remove the factory catalytic converters entirely and allow the header architecture to be optimized around exhaust flow and naturally aspirated engine performance.

LONG-TUBE PRIMARY RUNNERS:

Primary-runner length and geometry directly influence exhaust-pulse behavior.

Longer, smoother runners can improve the way pressure waves travel from the exhaust ports toward the collector.

SOUL's design targets improvements in:

• Exhaust scavenging

• Cylinder evacuation

• Exhaust-gas velocity

• Throttle response

• Midrange performance

• High-RPM breathing

This is particularly important on Porsche's high-revving GT engines, where exhaust-flow demand becomes substantial as engine speed approaches redline.

BILLET CNC-MACHINED MERGE COLLECTORS:

A major engineering feature of the Competition Headers is SOUL's billet merge collector.

Rather than using a conventional slip-fit or fabricated collector, SOUL designed the collector digitally and machines it for a precise, repeatable internal geometry.

The billet collector allows:

• Longer effective primary runners

• Controlled runner convergence

• Integrated merge spikes

• Smoother exhaust-pulse interaction

• Fewer welded joints

• Reduced possibility of collector leakage

• Greater structural durability

The collector architecture is designed as an integral component of the complete header rather than simply a junction between several tubes.

MERGE SPIKES:

SOUL incorporates merge spikes into the collector.

The merge spike helps guide individual exhaust streams as the primary runners converge, reducing the abrupt collision of exhaust pulses inside the collector.

This is intended to improve:

• Exhaust-flow quality

• Scavenging

• Gas velocity

• Throttle response

• High-RPM efficiency

BILLET 304L HEAD FLANGES:

The transition between the cylinder-head exhaust ports and the primary runners is another important restriction point.

SOUL uses billet 304L stainless-steel head flanges precision machined on 5-axis CNC equipment.

The billet design provides:

• Improved exhaust-port transition

• Accurate primary-runner alignment

• Greater structural strength

• Improved sealing consistency

• Increased durability under repeated thermal cycling

SOUL specifically designed the flange area to resist cracking during repeated aggressive track use.

.065-INCH T304L STAINLESS CONSTRUCTION:

The primary tubing is constructed from mandrel-bent:

.065-inch-wall T304L stainless steel

SOUL back-purges each assembly during TIG welding to protect the inside of the weld and promote proper penetration.

The construction is intended to provide a balance of:

• Strength

• Heat resistance

• Corrosion resistance

• Long-term track durability

• Fabrication consistency

DYNO-PROVEN PERFORMANCE:

SOUL independently tested the Competition Headers on a Dynojet using an AutoQuest Motorsport Porsche 991.2 GT3 RS.

Importantly, SOUL states that the before-and-after testing was performed with no other modifications.

The manufacturer reports gains of approximately:

+20.9 wheel horsepower

and

+26.2 lb-ft of torque

appearing early in the measured power curve.

At approximately:

8,400 RPM

SOUL recorded approximately:

+24.4 wheel horsepower

and

+15.3 lb-ft of torque

The headers therefore produced increased power throughout the upper power band rather than simply generating a short isolated peak.

SOUL summarizes the testing as providing maximum gains exceeding approximately:

+24 wheel horsepower

and

+26 lb-ft of torque

TESTED ON A 991.2 GT3 RS:

The published dyno results were obtained specifically on a:

Porsche 991.2 GT3 RS

with no other modifications during the before-and-after comparison.

Actual gains can vary based on:

• Engine version

• Vehicle condition

• Fuel

• ECU calibration

• Downstream exhaust configuration

• Ambient and dyno conditions

The published figures should therefore be understood as manufacturer test results rather than guaranteed output for every 991 GT3-family application.

ECU TUNING:

SOUL notes that an appropriate ECU calibration can take additional advantage of the increased exhaust flow and unlock further gains.

A tune can also be used to address catalyst-related diagnostic faults created by removing the factory catalytic converters.

An ECU tune is not required for the headers to physically bolt onto the vehicle, but SOUL recommends custom calibration for track applications where catalyst-related check engine lights need to be disabled.

CHECK ENGINE LIGHT:

Because the Competition Headers completely remove the factory catalytic converters, SOUL states that the system may trigger a check engine light.

The vehicle's catalyst-monitoring strategy may recognize that the factory emissions equipment is no longer present.

SOUL recommends an appropriate custom ECU calibration to address these catalyst-related diagnostic faults for closed-course use.

SOUND CHARACTER:

Removing the factory catalytic converters and replacing the original manifolds with long-tube headers substantially changes the sound reaching the downstream exhaust.

Expect:

• Greater naturally aspirated flat-six volume

• Sharper throttle-related sound

• Increased mechanical engine character

• Stronger midrange tone

• Greater high-RPM intensity

• More aggressive downshifts

• Increased race-derived character

• More pronounced flat-six wail approaching redline

The final volume depends heavily on the downstream exhaust configuration.

WITH FACTORY REAR EXHAUST:

The Competition Headers can be paired with the original Porsche rear exhaust.

This retains the factory:

• Center muffler

• Side mufflers

• Exhaust valves

while replacing the restrictive catalytic header assemblies upstream.

This configuration provides a substantial increase in exhaust flow and sound while retaining Porsche's downstream sound-control hardware.

WITH SOUL CENTER MUFFLER BYPASS:

Combining the Competition Headers with SOUL's Center Muffler Bypass creates a significantly more aggressive exhaust system.

This configuration:

• Removes the factory catalysts

• Removes the factory center muffler

• Retains the factory side mufflers

• Retains factory exhaust-valve functionality

• Produces substantially greater flat-six sound

• Further reduces rear exhaust-system weight

WITH SOUL VALVED SIDE MUFFLER BYPASS:

Pairing the Competition Headers with SOUL's Valved Side Muffler Bypass Pipes provides:

• Catless long-tube headers

• 3-inch side-muffler bypass piping

• Factory center muffler retained

• Factory exhaust-valve functionality retained

• Significant rear weight reduction

• Reduced exhaust heat around the engine bay and rear tires

• Substantially increased exhaust flow

This provides an aggressive configuration while retaining driver-selectable sound control.

WITH SOUL NON-VALVED SIDE MUFFLER BYPASS:

Pairing the Competition Headers with the non-valved Side Muffler Bypass creates an even more track-focused configuration.

This combination eliminates:

• Factory catalytic converters

• Factory side mufflers

while retaining the factory center muffler.

The result prioritizes:

• Maximum weight reduction

• Increased exhaust flow

• Reduced heat retention

• Constant aggressive exhaust character

OPTIONAL CERAMIC COATING:

SOUL offers optional Jet-Hot ceramic coating for the Competition Headers by special order.

Available coating systems include:

Extreme 1300

and

Ultra Extreme Heat 2500

SOUL states that the coatings can reduce surrounding temperatures by as much as approximately 65% while also helping protect the headers from thermal oxidation and corrosion.

Ceramic coating is available at additional cost and should be quoted separately.

COMPETITION HEADERS VS. STREET HEADERS:

Competition Headers

• $5,495.00

• Completely catless

• Maximum available header flow

• Dyno-tested on an otherwise stock 991.2 GT3 RS

• Maximum manufacturer-tested gains exceeding 24 whp and 26 lb-ft

• More aggressive exhaust sound

• Greater catalyst-related diagnostic considerations

• Optional ceramic coating available

• Closed-course competition configuration

Street Headers

• $6,495.00

• Retain performance catalytic converters

• More street-oriented configuration

• Reduced emissions-related diagnostic concerns

• Same high-quality billet and stainless construction philosophy

The Competition Headers are the more aggressive option for customers prioritizing flow, sound, and track-oriented performance.

EMISSIONS / COMPETITION USE NOTE:

The SOUL Competition Headers completely remove the factory catalytic converters.

This product is not CARB certified and SOUL specifies it for closed-course competition use only.

United States customers purchasing the product are required by SOUL to sign its Catless Exhaust Component Waiver.

Use on emissions-controlled vehicles operated on public roads may violate applicable regulations.

Customers are responsible for determining compliance with all applicable federal, state, and local laws before installation or use.

Porsche 991.1 / 991.2 GT3 / GT3 RS / 911R SOUL Side Muffler Bypass Pipes

$1,495.00

Product Description

The SOUL Side Muffler Bypass Pipes are a lightweight, non-valved exhaust upgrade for Porsche 991.1 and 991.2 GT3 / GT3 RS models and the 911R, replacing the heavy factory side mufflers with large-diameter 3-inch stainless-steel bypass pipes while retaining the factory center muffler.

The factory side-muffler assemblies weigh approximately 44.9 lbs, while the complete SOUL bypass system weighs only approximately 6.6 lbs, removing an impressive 38.3 lbs / 17.3 kg from the rear of the vehicle.

In addition to the substantial weight reduction, deleting the side mufflers reduces heat retention around the engine bay and rear tires. Large-diameter 3-inch piping increases exhaust flow, while integrated flex bellows provide compliance for thermal expansion and aggressive track use.

Unlike SOUL's Valved Side Muffler Bypass, this system is permanently non-valved. There is no selectable quiet mode—the exhaust delivers its freer-flowing, race-derived character at all times.

FITMENT:

• Fits 2014–2016 Porsche 991.1 911 GT3

• Fits 2016 Porsche 991.1 911 GT3 RS

• Fits 2016 Porsche 911R

• Fits 2018–2019 Porsche 991.2 911 GT3

• Fits 2018–2019 Porsche 991.2 911 GT3 with Touring Package

• Fits 2019 Porsche 991.2 911 GT3 RS

• SOUL specifies fitment for all Porsche 991.1 / 991.2 GT3 and GT3 RS models including the 911R from 2014–2019

• Retains the factory center muffler

• Replaces the factory side mufflers

• Compatible with the factory header and catalytic-converter system

• Direct bolt-on installation

DETAILS:

• Non-valved Side Muffler Bypass Pipe system

• Deletes both factory side mufflers

• Retains the original Porsche center muffler

• Permanently freer-flowing exhaust configuration

• No selectable valves-open / valves-closed sound modes

• Large-diameter 3-inch primary piping

• Constructed from mandrel-bent T304L stainless steel

• .065-inch wall thickness

• High-quality flex bellows incorporated into the system

• Flex bellows simplify installation and accommodate component movement

• Flex bellows help reduce stress during repeated heat cycles and aggressive track use

• Enlarged opening into the secondary center-muffler path

• Secondary-path design helps equalize pressure within the retained factory center muffler

• Pressure balancing is intended to reduce stress on the factory center muffler

• Significantly reduces rear exhaust-system weight

• Helps reduce heat soak in the engine bay

• Helps reduce exhaust-system heat transferred toward the rear tires

• SOUL system weighs approximately 6.6 lbs / 3.0 kg

• Factory side-muffler components weigh approximately 44.9 lbs / 20.4 kg

• Saves approximately 38.3 lbs / 17.3 kg

• No cutting required

• No welding required

• No permanent exhaust modification required

• Every system is fixture-tested for proper fitment

• Designed and built in-house by SOUL Performance Products in Willow Grove, Pennsylvania

• Backed by SOUL's Lifetime Warranty for street and track use

WHY DELETE THE SIDE MUFFLERS?

The factory GT3 exhaust uses substantial side-muffler assemblies that contribute considerable weight and retain heat in the rear of the vehicle.

SOUL replaces those components with compact 3-inch stainless-steel bypass pipes.

The result is a significant reduction in:

• Exhaust-system weight

• Rear vehicle mass

• Engine-bay heat retention

• Heat accumulation near the rear tires

while retaining the factory center muffler to help control overall sound character.

38.3-LB WEIGHT REDUCTION:

Weight savings are one of the primary reasons to choose the non-valved Side Muffler Bypass.

Factory Side-Muffler Components:
Approximately 44.9 lbs / 20.4 kg

SOUL Side Muffler Bypass Pipes:
Approximately 6.6 lbs / 3.0 kg

Total Weight Savings:
Approximately 38.3 lbs / 17.3 kg

This removes nearly 40 lbs from the extreme rear of a rear-engined 911 without requiring replacement of the factory headers or center muffler.

HEAT MANAGEMENT:

Factory mufflers retain considerable thermal energy after extended high-load operation.

Removing the large side mufflers reduces the amount of hot exhaust hardware surrounding the rear of the vehicle.

SOUL specifically identifies two benefits:

• Reduced engine-bay heat soak

• Reduced heat exposure around the rear tires

These benefits become increasingly relevant during repeated track sessions where exhaust temperatures remain elevated for extended periods.

3-INCH PRIMARY PIPING:

The Side Muffler Bypass uses:

3-inch-diameter primary piping

constructed from:

.065-inch-wall T304L stainless steel

The larger-diameter path reduces the restriction created by the original side-muffler assemblies and provides substantial exhaust-flow capacity for the naturally aspirated GT engine.

RETAINS THE FACTORY CENTER MUFFLER:

This system removes the side mufflers, not the center muffler.

The original Porsche center muffler remains installed and continues to contribute acoustic attenuation.

This creates a fundamentally different sound character than a Center Muffler Bypass.

The configuration combines:

• Lightweight side-muffler deletion

• Increased exhaust flow

• Reduced rear heat

• Retained center-muffler sound control

• Permanently non-valved operation

NON-VALVED DESIGN:

Unlike SOUL's Valved Side Muffler Bypass, this version eliminates the exhaust-valve functionality associated with the side-muffler assemblies.

There is:

• No electronic or vacuum-controlled exhaust valve

• No driver-selectable quiet mode

• No factory valves-open / valves-closed transition

• No additional valve hardware

The system provides its performance-oriented exhaust path continuously.

This makes the non-valved version particularly attractive for customers prioritizing:

• Minimum weight

• Simplicity

• Maximum consistency

• Track use

• Constant exhaust character

SOUND CHARACTER:

SOUL describes the Side Muffler Bypass as increasing overall volume without introducing undesirable tonal characteristics.

Expect:

• Increased naturally aspirated flat-six presence

• Greater cabin sound

• More race-derived exhaust character

• More exotic tone

• Increased mechanical character

• Stronger high-RPM sound

• Particularly dramatic exhaust character above 5,000 RPM

SOUL specifically notes increased cabin presence in approximately the:

2,000–3,000 RPM range

Above approximately:

5,000 RPM

the system increasingly emphasizes the GT engine's high-RPM exhaust character.

CABIN PRESENCE:

Because this is a permanently non-valved system, customers should expect more exhaust presence inside the vehicle than with the factory exhaust or SOUL's valved version.

SOUL specifically identifies increased cabin presence around:

2,000–3,000 RPM

This is an important consideration for vehicles primarily used for long-distance street driving.

Drivers who want the ability to substantially reduce exhaust presence on demand should consider the Valved Side Muffler Bypass instead.

CENTER-MUFFLER PRESSURE MANAGEMENT:

The SOUL bypass pipes retain a secondary flow path into the factory center muffler.

SOUL enlarges the opening leading into this secondary section to help equalize pressure within the center muffler.

This is designed to:

• Improve pressure distribution

• Reduce localized loading

• Reduce stress on the factory center muffler

• Lower the likelihood of center-muffler cracking

This is particularly important because removing the factory side mufflers substantially changes the exhaust-flow architecture upstream of the retained center muffler.

FLEX BELLOWS:

High-quality flex bellows are incorporated into the bypass pipes.

The flex sections provide compliance for:

• Thermal expansion

• Engine movement

• Exhaust-system movement

• Manufacturing tolerances

• Chassis movement

• Repeated track heat cycles

SOUL specifically incorporates the bellows to simplify installation and help prevent cracking under extreme racing conditions.

SIDE MUFFLER BYPASS VS. VALVED SIDE MUFFLER BYPASS:

Non-Valved Side Muffler Bypass

• $1,495.00

• Permanently non-valved

• Approximately 6.6 lbs

• Approximately 38.3 lbs lighter than factory

• 3-inch primary piping

• Maximum simplicity

• Lowest weight

• Constant performance exhaust character

• No quiet mode

Valved Side Muffler Bypass

• $2,095.00

• Retains selectable exhaust-valve functionality

• Approximately 9.5 lbs

• Approximately 35.4 lbs lighter than factory

• 3-inch primary piping

• Allows quieter and louder operating modes

• Better suited to customers wanting additional street flexibility

The non-valved system saves an additional 2.9 lbs compared with the Valved Side Muffler Bypass while eliminating the exhaust-valve hardware entirely.

SIDE MUFFLER BYPASS VS. CENTER MUFFLER BYPASS:

Side Muffler Bypass

• Removes both factory side mufflers

• Retains the factory center muffler

• Approximately 38.3 lbs of weight savings

• Major reduction in rear exhaust heat

• 3-inch performance piping

• More exotic / race-derived sound character

• Permanently non-valved

Center Muffler Bypass

• Removes the factory center muffler

• Retains factory side mufflers

• Retains factory exhaust valves

• Approximately 11 lbs of weight savings

• More dramatic driver-controlled sound change

• Better sound-control flexibility

Customers primarily focused on weight reduction and heat management will gain considerably more from the Side Muffler Bypass.

WITH FACTORY HEADERS:

When paired with the original Porsche headers, the vehicle retains its factory:

• Catalytic converters

• Oxygen sensors

• Header assemblies

while replacing only the side-muffler assemblies.

This configuration provides:

• Major weight reduction

• Reduced rear exhaust heat

• Increased exhaust flow

• Increased sound

• Retained factory center muffler

WITH UPGRADED HEADERS:

The Side Muffler Bypass can also form part of a more aggressive exhaust configuration using higher-flowing aftermarket headers.

Changing the headers can substantially increase:

• Overall exhaust volume

• High-RPM intensity

• Exhaust-flow capability

• Engine character

• Track-oriented sound

Customers should confirm compatibility with the specific header and oxygen-sensor configuration being used.

DIRECT BOLT-ON INSTALLATION:

The Side Muffler Bypass Pipes are designed as a direct bolt-on replacement for the factory side mufflers.

SOUL specifically states that installation requires:

• No cutting

• No modification

Each assembly is built and tested in a fixture to ensure proper fitment before being packaged for shipment.

PERFORMANCE:

The combination of large 3-inch piping and elimination of the factory side mufflers increases available exhaust-flow capacity.

SOUL does not publish a controlled standalone horsepower or torque figure for these Side Muffler Bypass Pipes.

DasMotoring therefore does not advertise a specific power gain.

The primary verified benefits are:

• 38.3 lbs of weight reduction

• Reduced engine-bay heat soak

• Reduced rear-tire heat exposure

• Increased exhaust flow

• Increased exhaust sound

EXHAUST TIPS:

This standalone product does not require a tip selection.

The Side Muffler Bypass Pipes replace the side-muffler section while retaining the factory center-exhaust architecture.

There are therefore no:

• Tip-style variants

• Tip-finish variants

• Catalyst variants

• Valve variants within this product

EMISSIONS / USE NOTE:

SOUL specifies that this product is not CARB certified and may not be legal for use on emissions-controlled vehicles.

SOUL lists the product as intended for off-road use only.

Customers are responsible for determining compliance with applicable federal, state, and local regulations before installation or use.

Porsche 991.1 / 991.2 GT3 / GT3 RS / 911R SOUL Valved Side Muffler Bypass Pipes

$2,095.00

Product Description

The SOUL Valved Side Muffler Bypass Pipes are designed for Porsche 991.1 and 991.2 GT3 / GT3 RS models and the 911R, replacing the heavy factory side mufflers with large-diameter 3-inch valved bypass pipes while retaining the factory center muffler and factory exhaust-valve functionality.

This configuration removes a substantial amount of weight and heat from the rear of the vehicle without giving up the factory car's ability to reduce exhaust volume when desired.

SOUL's system weighs approximately 9.5 lbs, compared with approximately 44.9 lbs for the factory side-muffler components, resulting in an impressive 35.4-lb / 16-kg weight reduction.

With the valves closed, exhaust is directed through the more restrictive upper route into the factory center muffler, maintaining a relatively comfortable and refined exhaust note. As the valves open, the system provides a much freer 3-inch flow path, producing a smoother, more exotic, race-inspired flat-six sound.

FITMENT:

• Fits 2014–2016 Porsche 991.1 911 GT3

• Fits 2016 Porsche 991.1 911 GT3 RS

• Fits 2016 Porsche 911R

• Fits 2018–2019 Porsche 991.2 911 GT3

• Fits 2018–2019 Porsche 991.2 911 GT3 with Touring Package

• Fits 2019 Porsche 991.2 911 GT3 RS

• SOUL specifies fitment for all 991.1 / 991.2 GT3 and GT3 RS models including the 911R from 2014–2019

• Retains the factory center muffler

• Retains factory exhaust-valve functionality

• Compatible with the factory headers and catalysts

• Compatible with applicable aftermarket headers

• Direct bolt-on installation

DETAILS:

• Replaces both factory side mufflers

• Retains the factory center muffler

• Retains factory exhaust valves

• Retains factory Sport / exhaust-valve control functionality

• 3-inch primary exhaust piping

• Constructed from mandrel-bent T304L stainless steel

• .065-inch wall thickness

• High-quality flex bellows incorporated into the system

• Flex bellows improve installation tolerance

• Flex bellows help reduce stress during aggressive track use

• High-quality exhaust valves designed to operate like the factory system

• Enlarged secondary-path opening helps equalize pressure in the factory center muffler

• Pressure balancing helps promote center-muffler longevity

• Deletes the heavy factory side mufflers

• Helps reduce heat soak in the engine bay

• Helps reduce heat transferred toward the rear tires

• SOUL system weighs approximately 9.5 lbs / 4.3 kg

• Factory side-muffler components weigh approximately 44.9 lbs / 20.4 kg

• Saves approximately 35.4 lbs / 16 kg

• No cutting required

• No welding required

• No permanent modification required

• Each system is fixture-tested prior to shipment

• Foam-packed following final inspection

• Optional O2 sensor bungs can be added for aftermarket-header applications that relocate oxygen sensors to the side-muffler section

• O2 bungs are not included by default

• Designed and manufactured in-house by SOUL Performance Products in Willow Grove, Pennsylvania

• Exhaust valves and piping are covered by SOUL's Lifetime Warranty for street and track use

WHY DELETE THE SIDE MUFFLERS?

The factory GT3 exhaust incorporates:

• Headers

• Side mufflers

• Center muffler

The side mufflers contribute significant weight and retain considerable heat near the rear of the vehicle.

SOUL removes these large factory side-muffler assemblies and replaces them with compact, freer-flowing stainless-steel bypass pipes.

The result is a dramatic reduction in:

• Exhaust-system weight

• Exhaust heat retention

• Engine-bay heat soak

• Heat exposure around the rear of the vehicle

while retaining the factory center muffler to provide meaningful sound control.

35.4-LB WEIGHT REDUCTION:

The weight savings are one of the most significant advantages of this system.

Factory Side-Muffler Components:
Approximately 44.9 lbs

SOUL Valved Side Muffler Bypass Pipes:
Approximately 9.5 lbs

Weight Savings:
Approximately 35.4 lbs / 16 kg

That represents nearly an 79% reduction in the weight of the components being replaced.

Because this mass is located at the extreme rear of the vehicle, the reduction is particularly attractive on a rear-engined 911.

HEAT MANAGEMENT:

The factory side mufflers retain considerable heat within the rear of the vehicle.

Removing them reduces the amount of hot exhaust hardware surrounding:

• The engine bay

• Rear suspension area

• Rear tires

SOUL specifically highlights improved heat management as one of the major benefits of the Side Muffler Bypass design.

This becomes particularly relevant during repeated track sessions where heat accumulation can become substantial.

3-INCH PRIMARY PIPING:

The Valved Side Muffler Bypass Pipes use large:

3-inch primary tubing

to increase available exhaust flow compared with the factory side-muffler architecture.

The system is built from:

T304L stainless steel

with:

.065-inch wall thickness

This provides a balance of durability, heat resistance, and relatively low weight.

RETAINS THE FACTORY CENTER MUFFLER:

Unlike SOUL's Center Muffler Bypass Exhaust, this system removes the side mufflers while retaining the original Porsche center muffler.

That difference fundamentally changes the sound character.

The retained factory center muffler continues to provide:

• Acoustic attenuation

• Reduced cabin resonance

• Meaningful valves-closed refinement

• A smoother overall sound transition

This makes the Valved Side Muffler Bypass a particularly appealing option for owners prioritizing weight reduction and heat management without turning the car into a permanently extreme exhaust setup.

VALVES CLOSED:

With the exhaust valves closed, gases are routed through the smaller secondary path and into the more restrictive portion of the factory center muffler.

SOUL enlarged the opening into this secondary path to help equalize internal pressure in the center muffler.

With the valves closed, expect:

• Moderate increase in exhaust volume compared with stock

• Comfortable cruising characteristics

• Relatively restrained cabin presence

• Retention of the factory center muffler's sound attenuation

• Smoother sound transition than a Center Muffler Bypass configuration

• Greater exhaust character without excessive volume

VALVES OPEN:

As the factory exhaust valves open, exhaust gains access to the freer-flowing 3-inch primary path.

Expect:

• Greater exhaust flow

• Increased overall volume

• Smoother and more exotic exhaust tone

• Greater naturally aspirated flat-six presence

• Stronger high-RPM character

• More aggressive downshifts

• More pronounced burbles

• Refined race-derived pitch rather than simply additional bass

SOUL specifically describes the valves-open sound as having a more exotic character appropriate for the GT3 engine.

SMOOTHER VALVE TRANSITION:

One of the most important sound differences between a Side Muffler Bypass and a Center Muffler Bypass is how dramatically the sound changes when the valves open.

With a Center Muffler Bypass, the difference between valves closed and open can be very pronounced.

With the Valved Side Muffler Bypass:

• The valves-closed configuration is somewhat louder than a Center Muffler Bypass setup

• The valves-open configuration is somewhat less aggressive than a Center Muffler Bypass

• The transition between the two modes is noticeably smoother

This produces a more progressive change in sound as the factory valves operate.

SIDE MUFFLER BYPASS VS. CENTER MUFFLER BYPASS:

Valved Side Muffler Bypass

• $2,095.00

• Removes factory side mufflers

• Retains factory center muffler

• Retains factory exhaust valves

• 3-inch primary piping

• Approximately 35.4 lbs lighter than factory side-muffler components

• Greater heat reduction

• Smoother, more exotic exhaust tone

• Smoother transition between valves closed and open

• Slightly louder with valves closed

• Slightly quieter with valves open compared with a Center Muffler Bypass

Center Muffler Bypass

• Removes factory center muffler

• Retains factory side mufflers

• Retains factory valves

• Approximately 11 lbs lighter than factory

• Deeper and more aggressive sound

• More dramatic valve-open transition

• Quieter valves-closed behavior

• Louder valves-open character

The Valved Side Muffler Bypass is the stronger choice when weight reduction and heat management are major priorities.

VALVED VS. NON-VALVED SIDE MUFFLER BYPASS:

SOUL also offers a non-valved Side Muffler Bypass.

Valved Side Muffler Bypass

• Retains factory valve functionality

• Approximately 9.5 lbs

• Saves approximately 35.4 lbs

• Allows quieter and louder operating modes

• Better suited to mixed street and track use

Non-Valved Side Muffler Bypass

• Permanently unrestricted

• Approximately 6.6 lbs

• Saves approximately 38.3 lbs

• Approximately 2.9 lbs lighter than the valved version

• No exhaust-volume control

• More track-focused configuration

The valved system sacrifices only about 3 lbs relative to the non-valved version while retaining factory sound control.

FLEX BELLOWS:

SOUL incorporates high-quality flex bellows into the bypass pipes.

The bellows provide additional compliance between exhaust components, helping compensate for:

• Manufacturing tolerances

• Thermal expansion

• Engine movement

• Chassis movement

• Repeated track-induced heat cycles

SOUL notes that this approach mirrors the durability philosophy used by OEM exhaust systems.

CENTER-MUFFLER PRESSURE MANAGEMENT:

SOUL enlarges the opening leading into the secondary center-muffler path.

The goal is to help:

• Equalize pressure within the center muffler

• Distribute exhaust flow more effectively

• Reduce localized stress

• Promote factory center-muffler longevity

This is particularly relevant because the side-muffler bypass substantially changes how exhaust gases enter the retained factory center muffler.

DIRECT BOLT-ON INSTALLATION:

The Valved Side Muffler Bypass Pipes are designed for straightforward installation.

There is:

• No cutting

• No welding

• No permanent exhaust modification

• No ECU programming required for the bypass pipes themselves

Each system is built and tested in a dedicated fixture before shipment to ensure consistent fitment.

OPTIONAL O2 SENSOR BUNGS:

SOUL does not install oxygen-sensor bungs in the Side Muffler Bypass Pipes by default.

This keeps the system as simple and lightweight as possible.

However, optional O2 bungs can be added for vehicles using aftermarket headers that relocate oxygen sensors into the side-muffler section.

Customers running such a header configuration should confirm their oxygen-sensor arrangement before ordering.

WITH FACTORY HEADERS:

With factory Porsche headers retained, the oxygen sensors remain in their original locations and the optional side-bypass O2 bungs are generally unnecessary.

This configuration provides:

• Major weight reduction

• Improved heat management

• Increased exhaust sound

• Retained factory catalysts

• Retained factory center muffler

• Retained valve functionality

WITH AFTERMARKET HEADERS:

The bypass pipes can also be paired with upgraded headers.

If those headers relocate the oxygen sensors downstream into the side-muffler section, SOUL can add the required O2 bungs to the bypass pipes.

This should be determined before the parts are manufactured and shipped.

PERFORMANCE:

The large 3-inch primary piping and removal of the restrictive side-muffler assemblies increase available exhaust flow.

However, SOUL does not publish a verified standalone horsepower or torque gain for the Valved Side Muffler Bypass Pipes.

The primary manufacturer-documented benefits are:

• 35.4-lb weight reduction

• Reduced heat soak

• Increased exhaust flow

• Increased sound

• Retained factory valve functionality

EXHAUST TIPS:

This product does not include or require a separate exhaust-tip option.

The Valved Side Muffler Bypass Pipes replace the side-muffler assemblies while retaining the factory center-muffler / center-exit architecture.

There are therefore no tip style or finish variants associated with this standalone product.

EMISSIONS NOTE:

The Side Muffler Bypass Pipes themselves do not remove the factory catalytic converters when used with the original Porsche headers.

If the system is paired with aftermarket headers that alter or remove factory catalyst components, emissions compliance will depend on the complete exhaust configuration.

Customers are responsible for determining compliance with applicable regulations for their vehicle.

Porsche 991.1 / 991.2 GT3 / GT3 RS / 911R SOUL Street Headers

$6,495.00

Product Description

The SOUL Street Headers are designed for the Porsche 991.1 and 991.2 GT3 platform, replacing the restrictive factory header assemblies with a freer-flowing catted system engineered to improve power potential, throttle response, exhaust flow, and the sound of Porsche's high-revving naturally aspirated flat-six.

Even Porsche's GT3 exhaust system must balance performance against emissions requirements, packaging limitations, durability targets, and noise regulations. These constraints limit primary-runner length, runner diameter, and collector efficiency.

SOUL addresses these compromises with optimized runners, large-diameter free-flowing catalytic converters, and precision-machined billet stainless-steel head flanges and merge collectors.

The result is a more efficient exhaust path directly downstream of the cylinder heads, amplifying the character of whichever factory or aftermarket exhaust system is installed behind it while maintaining a catted configuration.

FITMENT:

• Fits 2014–2016 Porsche 991.1 911 GT3

• Fits 2016 Porsche 991.1 911 GT3 RS

• Fits 2016 Porsche 911R

• Fits 2018–2019 Porsche 991.2 911 GT3

• Fits 2018–2019 Porsche 991.2 911 GT3 with Touring Package

• Fits 2019 Porsche 991.2 911 GT3 RS

• Compatible with the naturally aspirated 3.8L and 4.0L GT flat-six engines, depending on model

• Direct replacement for the factory header assemblies

• Compatible with the factory downstream exhaust system

• Compatible with applicable SOUL rear exhaust upgrades

• Single header configuration with no tip or transmission variants

DETAILS:

• Direct-replacement Street Header upgrade

• Retains a catted exhaust configuration

• Large-diameter, free-flowing catalytic converters

• Optimized primary-runner architecture

• Improved transition from the cylinder-head exhaust ports into the header runners

• Designed to reduce restriction compared with the factory header assemblies

• Designed to improve exhaust flow

• Designed to improve throttle response

• Designed to increase power potential

• Amplifies naturally aspirated flat-six sound through the downstream exhaust

• Billet 304L stainless-steel head flanges

• Billet 304L stainless-steel merge collectors

• Head flanges and merge collectors precision machined using 5-axis CNC equipment

• Constructed from mandrel-bent .065-inch-wall T304L stainless steel

• Back-purged TIG welded

• ARCAL Prime argon used during welding

• Thick-gauge aluminum welding fixtures minimize distortion

• Designed to withstand repeated aggressive street and track use

• Every set undergoes rigorous quality control prior to shipment

• Foam-packed following final inspection

• Designed and manufactured in-house by SOUL Performance Products in Willow Grove, Pennsylvania

• Backed by SOUL Performance Products' Lifetime Warranty for street and track use

WHY UPGRADE THE FACTORY HEADERS?

The GT3's factory exhaust is exceptionally capable, but Porsche still has to design the system around requirements extending beyond maximum performance.

Those compromises affect:

• Primary-runner length

• Primary-runner diameter

• Collector geometry

• Catalyst packaging

• Exhaust-flow capacity

• Sound

SOUL identifies the factory headers as one of the first areas to address when increasing exhaust performance on the 991 GT3 platform.

The Street Headers replace this section while preserving catalytic converters for a more street-oriented configuration than SOUL's Competition Headers.

OPTIMIZED RUNNER DESIGN:

The individual runners are designed to provide a more efficient path from each exhaust port into the collector.

Runner geometry plays an important role in naturally aspirated engine performance because exhaust pulses influence cylinder evacuation and scavenging.

A properly designed header can improve:

• Exhaust-gas velocity

• Exhaust scavenging

• Cylinder evacuation

• Throttle response

• Midrange performance

• High-RPM breathing

This becomes especially important on Porsche's high-revving GT engines, where exhaust-flow demand increases dramatically toward the upper end of the tachometer.

LARGE-DIAMETER PERFORMANCE CATALYSTS:

Unlike SOUL's Competition Headers, the Street Headers retain catalytic converters.

The headers are built around large-diameter, free-flowing performance catalysts intended to reduce restriction compared with the original Porsche assemblies.

This provides a balance between:

• Improved exhaust flow

• Increased performance potential

• Greater exhaust character

• Catted operation

SOUL's current product page does not specify a catalyst cell count, so DasMotoring does not advertise one for this product.

BILLET 304L HEAD FLANGES:

SOUL uses billet 304L stainless steel for the cylinder-head flanges.

These components are precision machined using 5-axis CNC equipment.

The billet flange design provides:

• Accurate exhaust-port transitions

• Precise runner alignment

• Increased strength

• Improved durability under repeated heat cycling

• Reduced likelihood of cracking in a high-stress area

This is particularly relevant for GT3s subjected to frequent track use, where the exhaust repeatedly cycles through extreme temperatures.

CNC-MACHINED MERGE COLLECTORS:

The individual runners converge through precision-machined 304L stainless-steel merge collectors.

Rather than treating the collector simply as a junction between several tubes, SOUL optimizes the transition for exhaust flow and durability.

The merge collector influences:

• Exhaust-pulse convergence

• Gas velocity

• Scavenging

• Throttle response

• High-RPM breathing

• Exhaust sound

Using precision-machined components allows the geometry to remain highly consistent between header sets.

.065-INCH T304L STAINLESS CONSTRUCTION:

The header runners are manufactured from mandrel-bent:

.065-inch-wall T304L stainless steel

This construction is intended to balance:

• Strength

• Heat resistance

• Exhaust durability

• Long-term corrosion resistance

• Fabrication consistency

The headers are back-purged during TIG welding to protect the inside of the welds and promote proper penetration.

BUILT FOR TRACK USE:

SOUL specifically emphasizes durability in demanding environments.

The headers use:

• Billet stainless head flanges

• Billet stainless merge collectors

• Thick-wall stainless tubing

• Back-purged TIG welding

• Heavy-duty fabrication fixtures

SOUL's thick-gauge aluminum fixtures also act as heat sinks during fabrication, helping prevent warpage while maintaining consistent alignment.

This construction is intended to withstand repeated hard use and aggressive heat cycling.

SOUND CHARACTER:

Replacing the restrictive factory header assemblies allows more of the GT engine's natural exhaust character to reach the remainder of the exhaust system.

Expect:

• Greater flat-six presence

• Sharper throttle-related sound

• Increased mechanical character

• Stronger midrange exhaust tone

• Greater high-RPM intensity

• More pronounced naturally aspirated wail approaching redline

• Amplification of the characteristics of the downstream exhaust system

The final volume will depend heavily on whether the vehicle retains its factory center muffler and side mufflers or uses additional aftermarket exhaust components.

WITH FACTORY REAR EXHAUST:

The Street Headers can be used while retaining the factory Porsche rear exhaust system.

This configuration provides:

• Improved upstream exhaust flow

• Performance catalytic converters

• Increased throttle response

• Stronger engine character

• Retention of the original Porsche rear mufflers

• Retention of factory exhaust-valve functionality

This makes the Street Headers a logical first-stage exhaust upgrade for customers who want improved performance without immediately replacing every downstream exhaust component.

WITH SOUL CENTER MUFFLER BYPASS:

Pairing the Street Headers with SOUL's Center Muffler Bypass produces a considerably more aggressive configuration.

This combination retains:

• Catted headers

• Factory side mufflers

• Factory exhaust valves

while replacing the large factory center muffler.

Expect significantly more naturally aspirated sound while still retaining useful factory valve control.

WITH SOUL SIDE MUFFLER UPGRADES:

Further changes to the side mufflers can dramatically increase overall sound.

The Street Headers amplify whichever exhaust configuration is installed behind them, so customers should consider the complete system when selecting how aggressive they want the vehicle to become.

A car with Street Headers and otherwise factory exhaust will behave very differently from one using Street Headers plus center- and side-muffler bypass components.

STREET HEADERS VS. COMPETITION HEADERS:

Street Headers

• $6,495.00

• Retain performance catalytic converters

• More street-oriented configuration

• Increased exhaust flow

• Increased throttle response

• Greater naturally aspirated sound

• Billet CNC-machined flanges and collectors

• Suitable for aggressive street and track use

Competition Headers

• Completely catless

• Maximum available header flow

• Greater exhaust sound

• Lower purchase price

• Greater emissions and diagnostic considerations

• More competition-focused configuration

The Street Headers are the appropriate choice for customers seeking a freer-flowing header system while retaining catalytic converters.

PERFORMANCE:

SOUL describes the Street Headers as providing gains in:

• Power

• Throttle response

• Exhaust flow

• Exhaust tone

However, the current manufacturer product page does not publish a standalone horsepower or torque figure for this header set.

DasMotoring therefore does not advertise a specific numerical power increase.

WEIGHT:

SOUL does not currently publish verified factory and aftermarket weights for the 991 GT3 Street Headers.

No specific weight-savings figure should therefore be assumed.

ECU CALIBRATION / CHECK ENGINE LIGHT:

The current SOUL product page does not specify that ECU calibration is required for installation.

It also does not provide an unconditional no-CEL guarantee.

Because the factory catalyst assemblies are replaced with aftermarket performance catalytic converters, diagnostic behavior can depend on vehicle specification, calibration, catalyst condition, oxygen-sensor condition, and other modifications.

DasMotoring therefore does not advertise either a guaranteed no-CEL condition or a mandatory tuning requirement for this product.

EMISSIONS NOTE:

The SOUL Street Headers retain catalytic converters but replace the vehicle's original Porsche emissions-related exhaust assemblies with aftermarket performance components.

They are not CARB certified.

Customers are responsible for determining compliance with all applicable federal, state, and local regulations before installation or use.

Product Description

The SOUL Center Muffler Bypass Exhaust is a direct bolt-on upgrade for Porsche 991.1 and 991.2 GT3 / GT3 RS models and the 911R, replacing the heavy factory center muffler with a freer-flowing T304L stainless-steel exhaust section while retaining the factory side mufflers and exhaust-valve functionality.

By removing the center muffler, the system releases substantially more of the naturally aspirated flat-six soundtrack without eliminating the factory car's ability to control exhaust volume. The original side mufflers and valves remain functional, allowing the driver to retain the factory Sport / exhaust-valve controls for quieter cruising.

The result is a deeper, more aggressive tone at lower engine speeds that builds into the characteristic high-RPM GT3 wail as the engine approaches redline.

The SOUL Center Muffler Bypass also removes approximately 11 lbs from the rear of the vehicle, making it a simple way to increase sound, reduce weight, and improve exhaust flow without replacing the headers, catalytic converters, or complete exhaust system.

FITMENT:

• Fits 2014–2012016 Porsche 991.1 911 GT3

• Fits 2016 Porsche 991.1 911 GT3 RS

• Fits 2016 Porsche 911R

• Fits 2018–2019 Porsche 991.2 911 GT3

• Fits 2018–2019 Porsche 991.2 911 GT3 with Touring Package

• Fits 2019 Porsche 991.2 911 GT3 RS

• SOUL specifies fitment for all 991.1 / 991.2 GT3 and GT3 RS models, including the 911R, from 2014–2019

• Compatible with the factory side mufflers

• Retains factory exhaust-valve functionality

• Compatible with the factory headers and catalytic converters

• Compatible with applicable upgraded headers

• Direct replacement for the factory center muffler

DETAILS:

• Direct bolt-on Center Muffler Bypass Exhaust

• Replaces the factory center muffler

• Retains the original Porsche side mufflers

• Retains factory exhaust valves

• Retains factory Sport / exhaust-valve control functionality

• Increases naturally aspirated flat-six exhaust volume

• Produces a deeper tone at lower RPM

• Produces a more aggressive high-RPM GT3 wail

• Particularly aggressive when paired with upgraded headers

• Removes approximately 11 lbs from the rear of the vehicle

• Constructed from mandrel-bent T304L stainless steel tubing

• Includes Mikalor Supra Heavy-Duty W4 clamps

• Mikalor clamps use high-strength stainless-steel hardware

• Includes AccuSeal clamps for connection to the factory side mufflers

• No cutting required

• No welding required

• No ECU programming required

• Straightforward installation suitable for experienced DIY enthusiasts

• Each exhaust is fixture-tested before shipment

• Foam-packed following final inspection

• No check engine lights occurred during SOUL's development and long-term road testing

• Six exhaust-tip configurations available

• Two 4-inch single-wall tip styles

• Three tip finishes

• Backed by SOUL Performance Products' Lifetime Warranty for street and track use

RETAINS FACTORY SIDE MUFFLERS:

The Center Muffler Bypass replaces only the large center muffler.

The original Porsche side mufflers remain installed and continue to provide sound attenuation when the factory exhaust valves command the quieter flow path.

This provides a useful balance between:

• Increased exhaust volume

• More aggressive flat-six character

• Factory-style sound control

• Daily-driving comfort

• Track-oriented sound when desired

For owners who want noticeably more sound without replacing the entire exhaust system, this is one of the simplest modifications available for the 991 GT3 platform.

FACTORY EXHAUST VALVE FUNCTIONALITY:

Unlike a complete muffler-delete system, the Center Muffler Bypass retains the original Porsche side mufflers and exhaust valves.

The factory exhaust controls therefore continue operating normally.

With the quieter exhaust mode selected, the side mufflers continue reducing overall volume.

With the aggressive exhaust mode selected, the vehicle reveals substantially more of the Center Muffler Bypass's freer-flowing sound.

This preserves a meaningful difference between the quieter and louder operating modes.

VALVES CLOSED:

With the factory valves in their quieter operating state, the retained side mufflers continue providing sound attenuation.

Expect:

• Relatively restrained cruising volume

• Comfortable highway behavior

• Reduced cabin presence

• Deeper tone than stock

• Retention of factory-style sound control

• Greater daily-driving usability than a full muffler-delete exhaust

SOUL specifically developed the Center Muffler Bypass to increase sound without sacrificing normal street comfort.

VALVES OPEN:

With the factory exhaust valves open, substantially more of the naturally aspirated flat-six character becomes audible.

Expect:

• Greater exhaust volume

• Deeper low- and midrange tone

• Stronger throttle-related sound

• Sharper high-RPM character

• Increased mechanical presence

• More pronounced GT3 wail

• Greater contrast between quiet and aggressive modes

At higher RPM, the system allows substantially more of the GT3 engine's natural exhaust note to reach the driver.

11-LB WEIGHT REDUCTION:

Replacing the factory center muffler removes approximately:

11 lbs

from the rear of the vehicle.

Reducing mass at the extreme rear of a 911 is particularly desirable because the engine and much of the vehicle's drivetrain mass are already concentrated behind the rear axle.

The Center Muffler Bypass therefore provides both an acoustic upgrade and a meaningful reduction in rear exhaust-system weight.

WITH FACTORY HEADERS:

When installed with the original Porsche exhaust manifolds and catalytic converters, the Center Muffler Bypass changes only the downstream center-muffler section.

The factory:

• Headers

• Catalytic converters

• Oxygen sensors

• Side mufflers

• Exhaust valves

remain installed.

This makes the Center Muffler Bypass an attractive first exhaust modification for an otherwise stock GT3.

WITH UPGRADED HEADERS:

SOUL specifically designed the Center Muffler Bypass to work well with upgraded headers.

Combining higher-flow headers with the Center Muffler Bypass creates a substantially more aggressive configuration with:

• Increased exhaust flow

• Greater overall volume

• More pronounced high-RPM sound

• Stronger race-derived character

• Continued use of the factory side mufflers and valves

The final volume will depend heavily on whether the headers retain catalytic converters.

SOUND CHARACTER:

With the Center Muffler Bypass installed, expect:

• Deeper exhaust tone at idle and lower RPM

• Greater flat-six presence around town

• Stronger engine character under load

• More audible transitions between exhaust-valve positions

• Aggressive high-RPM sound

• Exotic naturally aspirated wail approaching redline

• Considerably greater volume when paired with aftermarket headers

The system is intended to provide substantially more character without forcing the owner into a permanently extreme exhaust configuration.

DIRECT BOLT-ON INSTALLATION:

The Center Muffler Bypass is designed as a straightforward replacement for the factory center muffler.

Installation requires:

• Removal of the factory center muffler

• Installation of the SOUL bypass assembly

• Connection to the existing side mufflers

• Installation and adjustment of the supplied clamps

There is:

• No cutting

• No welding

• No ECU programming

• No catalyst modification

• No exhaust-valve deletion

SOUL describes the installation as suitable for experienced DIY enthusiasts.

MIKALOR HEAVY-DUTY CLAMPS:

SOUL supplies Mikalor Supra Heavy-Duty W4 clamps with the exhaust.

These stainless-steel clamps use:

• Projection-welded construction

• Swinging bridge design

• High-strength stainless-steel bolts

• Captive nut and trunnion architecture

The design provides high clamping force and long-term durability in a high-temperature exhaust environment.

ACCUSEAL SIDE-MUFFLER CONNECTIONS:

SOUL also includes AccuSeal clamps for the connections between the Center Muffler Bypass and the factory side mufflers.

This allows the system to be installed and adjusted without permanent modification to the original Porsche exhaust components.

CHECK ENGINE LIGHT:

The Center Muffler Bypass does not remove the factory catalytic converters or oxygen sensors.

SOUL reports that no check engine lights occurred during development or long-term road testing.

No ECU calibration is required simply to install the Center Muffler Bypass.

PERFORMANCE:

The Center Muffler Bypass reduces exhaust restriction compared with the factory center muffler and increases overall exhaust flow.

However, SOUL does not publish a verified standalone horsepower or torque figure for this product.

DasMotoring therefore does not advertise a numerical power increase.

The primary documented benefits are:

• Increased exhaust sound

• Reduced rear exhaust-system weight

• Freer exhaust flow

• Retained factory valve functionality

EXHAUST TIP OPTIONS:

The Center Muffler Bypass uses 4-inch single-wall exhaust tips.

Two styles are available:

4" Slash Cut Single Wall

An angled outlet providing a more aggressive appearance.

4" Straight Cut Single Wall

A traditional straight-cut circular outlet.

Each style is available in:

• Signature Satin

• Brushed

• Satin Black

This creates six total configurations.

SIGNATURE SATIN:

The Signature Satin finish provides a clean metallic appearance that complements the factory GT-car styling.

Price: $1,675.00

BRUSHED:

The Brushed finish provides a more textured stainless-steel appearance while retaining a natural metallic look.

Price: $1,675.00

SATIN BLACK:

The Satin Black finish provides the darkest and most aggressive appearance of the three available tip finishes.

Price: $1,855.00

EMISSIONS NOTE:

When installed with the factory headers and catalytic converters, the SOUL Center Muffler Bypass does not remove the original emissions-control components.

If the exhaust is later combined with aftermarket headers or catalyst-delete components, the emissions configuration of the vehicle may change.

Customers are responsible for determining compliance with applicable regulations for their complete vehicle configuration.

Product Description

The SOUL Center Muffler is designed for Porsche 991 and 991.2 GT3 / GT3 RS owners who want a stronger, more durable replacement for the factory center muffler with the ability to choose either more exhaust volume or less exhaust volume than stock.

SOUL developed this system after observing failures of factory GT3 center mufflers, including vehicles that had not otherwise been heavily modified. For street and track-driven GT3s, repeated thermal cycling and sustained high exhaust temperatures can place considerable stress on the factory center muffler assembly.

Rather than simply duplicating the factory component, SOUL uses thicker-gauge stainless steel construction and offers two distinct internal sound configurations. The Louder Than OEM version increases naturally aspirated flat-six presence, while the Quieter Than OEM version is designed for owners who need additional sound control for tracks with restrictive noise limits.

The muffler installs directly in place of the factory center muffler without permanent vehicle modification and can be used with an otherwise stock exhaust system or as part of a more extensively modified GT3 exhaust configuration.

FITMENT:

• Fits 2014–2016 Porsche 991.1 GT3

• Fits 2016 Porsche 991.1 GT3 RS

• Fits 2018–2019 Porsche 991.2 GT3

• Fits 2019 Porsche 991.2 GT3 RS

• Compatible with the 3.8L naturally aspirated flat-six used in the 991.1 GT3

• Compatible with the 4.0L naturally aspirated flat-six used in the 991.1 GT3 RS and 991.2 GT3 / GT3 RS

• Direct replacement for the factory center muffler

• Compatible with otherwise stock exhaust systems

• Compatible with upgraded headers and other exhaust components retaining the factory center-muffler interface

• No permanent vehicle modification required

• Does not fit Carrera, Turbo, or GT2 RS applications

DETAILS:

• Direct bolt-in replacement for the factory GT3 center muffler

• Developed as a more durable alternative to the factory center muffler

• SOUL identified factory center-muffler failures on both stock and modified GT3 applications

• Constructed using thicker-gauge stainless steel than the factory component

• Available in Louder Than OEM and Quieter Than OEM configurations

• Louder version amplifies the naturally aspirated flat-six exhaust note

• Quieter version reduces overall exhaust volume compared with the factory muffler

• Quieter configuration is particularly useful for tracks with strict sound limits

• Suitable for vehicles with factory or upgraded header systems

• Direct bolt-on installation

• Includes four AccuSeal clamps

• Every component is quality-checked prior to shipment

• Fixture-tested to verify proper fitment

• Foam-packed to help protect the muffler during shipping

• Designed and manufactured in-house by SOUL Performance Products in Willow Grove, Pennsylvania

• Backed by SOUL Performance Products' Lifetime Warranty for both street and track use

SOUND LEVEL OPTIONS:

SOUL offers two Center Muffler configurations to allow the exhaust system to be tailored around the vehicle's intended use.

Louder Than OEM

The Louder Than OEM configuration increases the presence of the naturally aspirated GT3 flat-six while retaining a true center muffler rather than replacing it with a straight-through bypass.

This is the appropriate configuration for owners who want additional exhaust character while maintaining a muffled exhaust system.

Expect greater exhaust presence throughout the rev range with additional emphasis on the GT3's high-RPM character.

SOUL Part Number: POR.GT3.MUFL

Quieter Than OEM

The Quieter Than OEM configuration is designed to reduce overall exhaust volume compared with the factory center muffler.

This version is particularly useful for GT3 owners who regularly attend tracks with strict sound restrictions or for vehicles with headers and other exhaust modifications that have already substantially increased overall volume.

SOUL Part Number: POR.GT3.MUFQ

WHY REPLACE THE FACTORY CENTER MUFFLER?

SOUL developed this product after observing center-muffler failures across both the 997 and 991 generations of the GT3.

Repeated high-temperature operation, aggressive driving, and track use subject the center muffler to significant thermal cycling and vibration. Modified headers and other performance exhaust components can further increase the demands placed on the downstream exhaust system.

The SOUL Center Muffler uses thicker-gauge stainless construction to provide a more robust replacement while retaining a conventional muffled exhaust configuration.

This makes it particularly attractive for GT3 owners who want additional durability without converting the car to a center-muffler bypass.

LOUDER VS. QUIETER:

Choose Louder Than OEM if:

• You want more naturally aspirated GT3 exhaust sound

• You want to retain a true center muffler

• Your vehicle retains relatively quiet factory exhaust components

• Track noise restrictions are not a major concern

• You want additional high-RPM flat-six character without moving to a center bypass

Choose Quieter Than OEM if:

• Your local tracks enforce strict sound limits

• Your headers or other exhaust modifications have already increased volume substantially

• You want additional sound attenuation

• You want a durable replacement without increasing overall exhaust volume

CENTER MUFFLER VS. CENTER MUFFLER BYPASS:

The SOUL Center Muffler retains dedicated sound attenuation and is available in either louder-than-stock or quieter-than-stock configurations.

A center muffler bypass removes the center muffler's sound attenuation entirely for a more aggressive exhaust configuration and greater weight reduction.

For owners prioritizing maximum exhaust sound and minimum restriction, a center bypass provides the more aggressive solution.

For owners prioritizing durability, controlled sound levels, street usability, or track noise compliance, the SOUL Center Muffler provides the more appropriate solution.

EXHAUST TIP OPTIONS:

There are no exhaust-tip variants associated with this product.

The SOUL Center Muffler is a replacement center muffler assembly and retains the vehicle's existing downstream exhaust-tip configuration.

No exhaust-tip selection is required when ordering.