Product Description

The SOUL Sport Cat Race Pipes combine the uncompromised, valveless Race Pipe architecture of SOUL's Competition system with 200-cell high-flow catalytic converters for the 2018–2020 Porsche 991.2 911 GT2 RS.

Unlike the standard SOUL Sport Catalytic Converters, which retain the GT2 RS's ECU-controlled exhaust valves and factory muffled exhaust path, the Sport Cat Race Pipes eliminate the active valve system entirely. Exhaust flows through high-flow catalysts and a direct race-oriented path to the rear of the vehicle at all times.

SOUL replaces the approximately 700-cell factory catalytic converters with 200-cell high-flow catalysts, dramatically reducing post-turbo restriction while retaining catalytic converters. The result is substantially increased turbocharger sound, a much stronger 3.8L twin-turbo flat-six exhaust note, improved exhaust-flow capacity, and consistent sound without the abrupt changes created by Porsche's factory valve operation.

Despite retaining catalysts, the system weighs only approximately 13.3 lbs, compared with approximately 29.2 lbs for the corresponding factory exhaust components, removing approximately 15.9 lbs / 6.8 kg from the rear of the GT2 RS.

FITMENT:

• Fits 2018–2020 Porsche 991.2 911 GT2 RS

• Fits standard GT2 RS vehicles

• Fits Weissach Package vehicles

• Designed for the 3.8L twin-turbo flat-six

• Replaces the factory catalytic-converter and valved exhaust architecture

• Eliminates ECU-controlled exhaust-valve operation

• Retains high-flow catalytic converters

• Direct bolt-on race-oriented exhaust configuration

DETAILS:

• Complete Sport Cat Race Pipe system

• 200-cell high-flow catalytic converters

• Factory catalytic converters approximately 700 cell

• Retains catalytic converters

• Eliminates factory ECU-controlled exhaust valves

• Fixed, non-valved exhaust architecture

• No driver-selectable quiet mode

• Significantly increased turbocharger sound

• Increased flat-six exhaust volume and character

• Reduced post-turbo restriction

• Designed for increased performance potential

• Developed for CEL-free operation

• Avoids the strong exhaust fumes associated with completely catless Race Pipes

• Approximately 13.3 lbs / 6.0 kg

• Corresponding factory components approximately 29.2 lbs / 13.2 kg

• Saves approximately 15.9 lbs / 6.8 kg

• Approximately 54% lighter than the corresponding factory components

• Large-diameter race-pipe architecture

• Constructed from mandrel-bent T304L stainless steel

• .065-inch wall thickness

• CNC-cut flanges

• Back-purged welds

• Built and tested in thick-gauge aluminum fabrication fixtures

• Direct bolt-on installation

• Fixture-tested before shipment

• Hand built in Willow Grove, Pennsylvania

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

RACE PIPE ARCHITECTURE WITH CATALYTIC CONVERTERS

The Sport Cat Race Pipes occupy a unique position within SOUL's GT2 RS exhaust lineup.

They combine two concepts:

Sport Catalytic Converters

and

Competition Race Pipes

The result is a system that retains high-flow catalysts while deleting the GT2 RS's factory exhaust valves and muffled exhaust architecture.

This provides:

• Significantly reduced exhaust restriction

• Consistent exhaust sound

• Considerably more turbocharger presence

• Major weight reduction

• Catalyst functionality

• Reduced exhaust odor compared with a completely catless system

200-CELL HIGH-FLOW CATALYTIC CONVERTERS

Porsche equips the factory GT2 RS exhaust with approximately:

700-cell catalytic converters

SOUL replaces them with:

200-cell high-flow catalytic converters

The substantially more open catalyst substrate reduces exhaust restriction immediately downstream of the turbochargers.

This provides increased:

• Exhaust-flow capacity

• Turbocharger sound

• Engine character

• Performance potential

while continuing to route the exhaust through catalytic-converter substrates.

700 CELL VS. 200 CELL

Catalyst cell count describes the density of the catalyst substrate.

A higher cell count generally creates a denser internal structure.

Moving from approximately:

700 cell → 200 cell

creates a substantially more open exhaust path.

For the GT2 RS, this allows more of the sound generated by the turbochargers and 3.8L flat-six to reach the rear of the vehicle while reducing restriction after the turbines.

RETAINS CATALYTIC CONVERTERS

Unlike the Competition Race Pipes, the Sport Cat Race Pipes remain catted.

This means they retain several practical advantages over a completely catless system:

• Reduced exhaust odor

• Catalyst functionality

• Reduced likelihood of catalyst-related diagnostic faults

• More conservative street behavior

• Less raw exhaust smell during idle and low-speed driving

They remain an aggressive race-oriented exhaust, but they avoid several of the compromises inherent to a completely catless setup.

NO ECU-CONTROLLED EXHAUST VALVES

The factory GT2 RS uses ECU-controlled exhaust valves to alternate between different exhaust paths.

SOUL completely eliminates those valves in the Sport Cat Race Pipe configuration.

There is:

No valves-open mode

and

No valves-closed mode.

Instead, the freer-flowing race exhaust path is active continuously.

CONSISTENT SOUND CHARACTER

SOUL specifically notes that removing the ECU-controlled valves creates a smoother and less abrupt exhaust experience.

The factory system can change character noticeably as Porsche commands its valves open or closed.

With the Sport Cat Race Pipes, the exhaust behavior remains consistent.

The driver receives:

• Turbocharger sound at all times

• A consistently stronger engine note

• No sudden valve-induced sound transition

• Immediate acoustic feedback with throttle input

NO FACTORY QUIET MODE

Removing the valves also means removing the GT2 RS's factory ability to significantly reduce exhaust volume through its muffled route.

Customers should expect considerably greater sound during:

• Cold starts

• Idle

• Normal acceleration

• Highway driving

• High-RPM operation

• Deceleration

This system should not be selected by a customer whose priority is maintaining the factory dual-personality exhaust behavior.

DRAMATICALLY INCREASED TURBO SOUND

SOUL's high-flow catalysts allow much more of the GT2 RS turbochargers' natural sound to pass through the exhaust.

Expect substantially increased:

• Turbo spool

• Turbine whistle

• Boost-related sound

• Mechanical turbocharger character

• Throttle-transition sound

Because the system has no valves, that turbo character is present continuously rather than depending on the ECU opening the factory exhaust path.

3.8L TWIN-TURBO FLAT-SIX CHARACTER

The reduced restriction and simplified exhaust architecture allow substantially more of the engine itself to be heard.

Expect:

• Stronger cold starts

• Increased idle presence

• Greater acceleration volume

• More high-RPM intensity

• Stronger gear-change events

• Increased deceleration character

• A more motorsport-oriented overall sound

TURBOS HELP MANAGE CRUISING RESONANCE

Even though the Race Pipe architecture does not use the factory muffled path, the GT2 RS's turbochargers naturally attenuate some exhaust-pulse energy.

SOUL notes that the turbos help keep cruising behavior more manageable than might otherwise be expected from such an aggressive race exhaust.

That should not be interpreted as a guarantee of factory-like refinement or zero drone.

This remains a loud, fixed-volume performance exhaust.

REDUCED POST-TURBO RESTRICTION

The catalytic converters are positioned directly downstream of the turbochargers.

Reducing restriction in this location gives the turbine outlets a freer path into the remainder of the exhaust.

The Sport Cat Race Pipes provide additional exhaust-flow capacity for:

• Factory engine output

• ECU tuning

• Increased boost

• Intake upgrades

• Intercooler upgrades

• Turbocharger upgrades

• Higher-output GT2 RS builds

15.9-LB WEIGHT REDUCTION

SOUL publishes the following weights:

Corresponding Factory Components:
Approximately 29.2 lbs / 13.2 kg

SOUL Sport Cat Race Pipes:
Approximately 13.3 lbs / 6.0 kg

Weight Savings:
Approximately 15.9 lbs / 6.8 kg

This represents approximately a:

54% reduction

in the mass of the components being replaced.

That is an especially useful reduction because this hardware is located toward the extreme rear of the 911.

WHY IT SAVES MORE WEIGHT THAN THE SPORT CATALYTIC CONVERTERS

The standalone Sport Catalytic Converters weigh approximately:

16.4 lbs

and save approximately:

1.9 lbs

The Sport Cat Race Pipes weigh approximately:

13.3 lbs

and save approximately:

15.9 lbs

The difference is not simply the catalyst construction.

The Sport Cat Race Pipes replace more of the factory exhaust architecture, including the valved/muffled arrangement.

That is why SOUL compares them against approximately 29.2 lbs of factory equipment rather than the 18.3-lb factory baseline used for the standalone Sport Catalytic Converters.

T304L STAINLESS CONSTRUCTION

SOUL fabricates the Race Pipes from:

T304L stainless steel

with:

.065-inch wall thickness

This provides:

• High-temperature durability

• Corrosion resistance

• Structural strength

• Low relative mass

• Long service life

• Suitability for repeated track heat cycles

MANDREL-BENT TUBING

Mandrel bending helps preserve the intended internal cross-sectional area as the piping follows the required route through the tightly packaged GT2 RS engine compartment.

This supports a smooth and consistent exhaust path.

CNC-CUT FLANGES

SOUL uses precision CNC-cut flanges at the required exhaust interfaces.

This helps maintain:

• Proper exhaust sealing

• Accurate fitment

• Consistent alignment

• Long-term durability

BACK-PURGED WELDS

All welds are back purged during fabrication.

Shielding the interior of the stainless tubing reduces oxidation during welding and promotes:

• Proper weld penetration

• Cleaner internal weld surfaces

• Increased durability

• Consistent internal flow

THICK-GAUGE ALUMINUM FABRICATION FIXTURES

Each system is fabricated and tested in a thick-gauge aluminum fixture.

The fixture helps prevent heat-induced distortion and maintains:

• Flange alignment

• Pipe geometry

• Outlet positioning

• Repeatable vehicle fitment

DIRECT BOLT-ON INSTALLATION

The Sport Cat Race Pipes are designed as a bolt-on replacement for the corresponding factory exhaust hardware.

No cutting or welding is required during normal installation.

Each system is fixture-tested and quality checked prior to shipment.

DEVELOPED FOR CEL-FREE OPERATION

SOUL specifically states that the high-flow catalyst configuration provides increased performance without a check engine light.

This is a major distinction from the completely catless Competition Race Pipes.

DasMotoring should treat this as SOUL's intended operating behavior rather than an unconditional guarantee on every modified vehicle.

Diagnostic behavior can still be influenced by:

• ECU calibration

• Oxygen-sensor condition

• Additional modifications

• Vehicle condition

• Catalyst condition over time

NO CATLESS EXHAUST FUMES

Because the Sport Cat Race Pipes retain 200-cell catalysts, they avoid the strong untreated-exhaust odor associated with completely catless systems.

That can make a meaningful difference during:

• Cold starts

• Garage operation

• Traffic

• Low-speed driving

• Windows-down driving

while still providing a much freer exhaust path than the approximately 700-cell factory catalysts.

ECU TUNING

SOUL does not specify ECU tuning as a requirement for normal installation.

The Sport Cat Race Pipes are developed around operating without catalyst-related check engine lights.

A performance calibration may still provide additional gains by taking advantage of the increased exhaust-flow capacity, especially on a modified GT2 RS.

NO PUBLISHED STANDALONE DYNO RESULT

SOUL states that the Sport Cat Race Pipes increase exhaust flow and performance potential.

However, the current product page does not publish a controlled factory-exhaust versus Sport-Cat-Race-Pipe dyno comparison.

DasMotoring therefore does not advertise a specific horsepower or torque increase for this system.

SPORT CAT RACE PIPES VS. COMPETITION RACE PIPES

SOUL Sport Cat Race Pipes

• $4,135.00

• 200-cell high-flow catalytic converters

• Valveless

• Fixed race exhaust architecture

• Developed for CEL-free operation

• Reduced exhaust fumes

• Approximately 13.3 lbs

• Saves approximately 15.9 lbs

• Aggressive sound at all times

SOUL Competition Race Pipes

• $2,755.00

• Completely catless

• Valveless

• Fixed race exhaust architecture

• May trigger catalyst-related CELs

• Greater raw exhaust odor

• Approximately 8.3 lbs

• Saves approximately 20.9 lbs

• Maximum available race-pipe flow and weight reduction

The Sport Cat Race Pipes add approximately 5 lbs compared with the Competition Race Pipes but retain high-flow catalysts.

SPORT CAT RACE PIPES VS. SPORT CATALYTIC CONVERTERS

SOUL Sport Cat Race Pipes

• $4,135.00

• 200-cell catalysts

• No exhaust valves

• No factory quiet mode

• Fixed race-oriented sound

• Approximately 13.3 lbs

• Saves approximately 15.9 lbs

• Lower price

• More aggressive sound

SOUL Sport Catalytic Converters

• $5,515.00

• 200-cell catalysts

• Larger 76 mm exhaust valves

• Retains factory muffled exhaust path

• Retains dual-mode functionality

• Approximately 16.4 lbs

• Saves approximately 1.9 lbs

• Considerably more sound flexibility

The Sport Cat Race Pipes are actually $1,380 less expensive and remove substantially more weight, but they give up the sophisticated valve-controlled exhaust functionality retained by the Sport Catalytic Converters.

SPORT CAT RACE PIPES VS. CAT BYPASS PIPES

Sport Cat Race Pipes

• $4,135

• 200-cell catalysts

• Valveless

• No quiet mode

• 13.3 lbs

• 15.9 lbs saved

• Developed for CEL-free operation

• Reduced exhaust odor

Cat Bypass Pipes

• $4,555

• Completely catless

• Larger 76 mm valves

• Retains factory muffler

• Retains quiet mode

• 11.4 lbs

• 6.9 lbs saved

• Catalyst-related CEL possible

This comparison illustrates that catted versus catless is not the only decision in the GT2 RS catalog. Customers also need to decide whether retaining the factory exhaust-valve functionality matters to them.

EMISSIONS NOTE

The Sport Cat Race Pipes retain high-flow catalytic converters but replace the original Porsche catalyst and exhaust assemblies with aftermarket performance components.

SOUL states that the product is not CARB certified and may not be legal for use on emissions-controlled vehicles. It is designated for closed-course competition / off-road use only.

Customers are responsible for determining whether their complete vehicle configuration and intended use comply with applicable regulations.

Product Description

The SOUL Competition Race Pipes are the most aggressive exhaust configuration offered for the 2018–2020 Porsche 991.2 911 GT2 RS, replacing the factory catalytic converters, exhaust valves, and muffler architecture with an ultra-lightweight, completely catless and valveless straight-pipe system.

Unlike SOUL's Cat Bypass Pipes, which retain the factory exhaust valves and rear muffler, the Competition Race Pipes eliminate the GT2 RS's dual-mode exhaust architecture entirely. Exhaust flows directly from the turbocharger area toward the rear outlets without catalytic converters, ECU-controlled valves, or the factory muffler system.

The result is maximum turbocharger presence, an extremely aggressive 3.8L twin-turbo flat-six exhaust note, substantial reduction in exhaust restriction, and one of the largest weight reductions available within the SOUL GT2 RS exhaust lineup.

The complete SOUL Competition Race Pipe assembly weighs approximately 8.3 lbs, compared with approximately 29.2 lbs for the factory components it replaces, removing approximately 20.9 lbs / 9.4 kg from the rear of the GT2 RS.

FITMENT:

• Fits 2018–2020 Porsche 991.2 911 GT2 RS

• Fits standard GT2 RS vehicles

• Fits Weissach Package vehicles

• Designed for the 3.8L twin-turbo flat-six

• Replaces the factory catalytic-converter sections

• Replaces the factory valved exhaust architecture

• Eliminates the factory muffler flow path

• Eliminates ECU-controlled exhaust-valve operation

• Direct bolt-on replacement

• Competition / closed-course-oriented configuration

DETAILS:

• Complete Competition Race Pipe system

• Completely catless

• Completely valveless

• Eliminates the factory catalytic converters

• Eliminates the factory ECU-controlled exhaust valves

• Bypasses / replaces the factory muffled exhaust architecture

• Straight-through race-oriented design

• Extremely aggressive exhaust volume

• Maximum turbocharger sound

• Increased post-turbo exhaust-flow capacity

• Dramatically increased 3.8L flat-six character

• Turbochargers help reduce some cruising resonance

• No driver-selectable quiet mode

• Approximately 8.3 lbs / 3.8 kg

• Corresponding factory exhaust components approximately 29.2 lbs / 13.2 kg

• Saves approximately 20.9 lbs / 9.4 kg

• Approximately 72% lighter than the corresponding factory components

• Constructed from mandrel-bent T304L stainless steel

• .065-inch wall thickness

• CNC-cut flanges

• Back-purged welds

• Built in thick-gauge aluminum fabrication fixtures

• Fixture-tested prior to shipment

• Direct bolt-on installation

• May trigger catalyst-related check engine lights

• Custom ECU calibration recommended for catalyst-related CEL management on competition vehicles

• Optional O2 spacers available separately

• No product variants

• Designed and hand built in Willow Grove, Pennsylvania

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

FULL RACE EXHAUST ARCHITECTURE

The Competition Race Pipes are fundamentally different from the Cat Bypass Pipes we just cataloged.

The Cat Bypass Pipes remove the catalytic converters but retain:

• Exhaust valves

• Factory ECU valve control

• Factory rear muffler

• Quiet valves-closed operation

The Competition Race Pipes eliminate:

• Catalytic converters

• Exhaust valves

• ECU-controlled valve operation

• Factory muffler routing

The result is a fixed, straight-through exhaust path intended to maximize sound, flow, simplicity, and weight reduction.

CATLESS

The Competition Race Pipes completely remove the original Porsche catalytic converters.

This eliminates the catalyst substrates immediately downstream of the turbochargers and allows exhaust gases to flow through a substantially less restrictive path.

Benefits include:

• Maximum catalyst-section flow

• Increased turbocharger sound

• Increased exhaust volume

• Reduced exhaust-system mass

• Greater performance potential on modified vehicles

This configuration also introduces the emissions, exhaust-odor, and diagnostic consequences associated with removing the factory catalysts.

VALUELESS DESIGN

The factory GT2 RS uses ECU-controlled exhaust valves to vary how much exhaust flows directly toward the tips versus through the factory muffler system.

The Competition Race Pipes remove that functionality entirely.

There is:

No valves-open mode.

No valves-closed mode.

No ECU-controlled exhaust-volume change.

The race exhaust path is active continuously.

NO FACTORY QUIET MODE

This distinction is particularly important for GT2 RS customers.

With SOUL's:

Cat Bypass Pipes

or

Sport Catalytic Converters

the factory valves and muffler continue providing a comparatively restrained valves-closed mode.

With the Competition Race Pipes, that capability is removed.

Customers should expect the car to remain aggressive at all times.

EXTREMELY LOUD

SOUL explicitly warns that the Competition Race Pipes are:

very loud.

This is a straight-pipe race configuration on a 700-horsepower twin-turbo GT2 RS.

Expect a dramatic increase in:

• Cold-start volume

• Turbocharger spool

• Turbine sound

• Flat-six engine note

• Acceleration volume

• High-RPM intensity

• Shift-related sound

• Deceleration character

• Overall cabin presence

This is not intended to provide factory-like refinement.

TURBOCHARGER SOUND

Removing both the catalytic converters and the factory muffled/valved architecture makes the turbochargers dramatically more audible.

Expect substantially more:

• Turbo spool

• Turbine whistle

• Boost-related sound

• Throttle-transition sound

• Mechanical turbocharger character

SOUL describes the turbo note as intense essentially all the time rather than only when the factory ECU decides to open the exhaust valves.

3.8L FLAT-SIX SOUND

The Competition Race Pipes also allow substantially more of the GT2 RS engine's combustion and exhaust-pulse character to reach the rear outlets.

Expect a much bolder:

• Idle

• Acceleration note

• Midrange exhaust character

• High-RPM roar

• Gear-change sound

• Deceleration note

The system prioritizes motorsport character rather than acoustic isolation.

TURBOS HELP CONTROL CRUISING DRONE

Despite the absence of mufflers and valves, SOUL notes that the turbochargers themselves provide some acoustic attenuation during steady-state cruising.

Turbocharger turbines naturally interrupt and absorb some exhaust-pulse energy before the gases enter the downstream exhaust system.

SOUL therefore describes cruising resonance as more manageable than might be expected from a completely straight-piped naturally aspirated engine.

That does not mean the Competition Race Pipes are quiet or drone-free.

They remain an extremely aggressive race exhaust.

MAXIMUM FLOW

Eliminating the:

• Catalytic substrates

• Valve assemblies

• Factory muffler path

removes multiple restrictions from the exhaust system.

The resulting straight-through architecture provides substantial exhaust-flow capacity for:

• Factory power levels

• ECU tuning

• Increased boost

• Intake modifications

• Intercooler upgrades

• Turbocharger upgrades

• Higher-output engine builds

20.9-LB WEIGHT REDUCTION

SOUL publishes:

Factory Components:
approximately 29.2 lbs / 13.2 kg

SOUL Competition Race Pipes:
approximately 8.3 lbs / 3.8 kg

Weight Savings:
approximately 20.9 lbs / 9.4 kg

That represents roughly a:

72% reduction

in the weight of the corresponding factory exhaust components.

This is one of the most significant weight reductions within SOUL's GT2 RS exhaust catalog.

WHY THE FACTORY WEIGHT IS 29.2 LBS HERE

The Competition Race Pipe weight comparison should not be confused with the Cat Bypass Pipe comparison.

SOUL's Cat Bypass Pipes replace only the factory catalyst/valve sections and are compared with approximately:

18.3 lbs of factory hardware

The Competition Race Pipes eliminate more of the factory exhaust architecture, so SOUL compares them with approximately:

29.2 lbs of factory components

This is why:

Cat Bypass Pipes save 6.9 lbs

while:

Competition Race Pipes save 20.9 lbs

The two weight figures represent different amounts of factory hardware being replaced.

T304L STAINLESS CONSTRUCTION

SOUL fabricates the Competition Race Pipes from:

T304L stainless steel

with:

.065-inch wall thickness

T304L provides:

• High-temperature durability

• Corrosion resistance

• Structural strength

• Low mass

• Long service life

• Suitability for repeated track heat cycles

MANDREL-BENT TUBING

SOUL uses mandrel-bent tubing to maintain the intended internal cross section through the exhaust routing.

This minimizes unwanted deformation through bends and supports a smooth exhaust-flow path.

CNC-CUT FLANGES

The Race Pipes use precision CNC-cut flanges at the required mounting interfaces.

Accurate flange geometry helps maintain:

• Exhaust sealing

• Proper alignment

• Installation consistency

• Long-term durability

BACK-PURGED WELDS

All welds are back purged during fabrication.

Shielding the inside of the stainless tubing during welding helps provide:

• Cleaner internal weld surfaces

• Reduced oxidation

• Proper weld penetration

• Greater long-term durability

This is especially valuable on exhaust components exposed to sustained track temperatures.

THICK-GAUGE ALUMINUM FABRICATION FIXTURES

SOUL constructs each system in a thick-gauge aluminum fixture.

The fixture helps control heat distortion during fabrication and maintains:

• Flange location

• Pipe alignment

• Outlet positioning

• Repeatable vehicle fitment

FIXTURE-TESTED FITMENT

Every set is tested in its production fixture before shipment.

SOUL then performs a final quality-control inspection and foam packs the components for transportation.

DIRECT BOLT-ON INSTALLATION

The Competition Race Pipes are designed as a bolt-on replacement for the corresponding factory exhaust hardware.

No permanent chassis modification is required during normal installation.

Because this product replaces significantly more hardware than the standalone Cat Bypass Pipes, installation is more involved than a simple rear exhaust-tip or muffler modification.

CHECK ENGINE LIGHT

Because the Competition Race Pipes completely eliminate the factory catalytic converters, the vehicle may detect that catalyst functionality is no longer present.

SOUL states that the system:

may trigger a check engine light.

DasMotoring therefore does not represent this system as CEL-free.

O2 SPACERS

SOUL notes that O2 spacers are available separately to reduce the likelihood of catalyst-related diagnostic faults.

They are not included as part of the standard Competition Race Pipe SKU.

DasMotoring does not represent O2 spacers as a guaranteed CEL-prevention solution.

ECU TUNING

SOUL recommends an appropriate custom ECU calibration for catalyst-related CEL management on competition vehicles.

A tune is not required for the Race Pipes to physically bolt onto the vehicle.

A suitable performance calibration may also allow a modified GT2 RS to take greater advantage of the system's reduced exhaust restriction.

NO PUBLISHED STANDALONE DYNO RESULT

SOUL describes the Competition Race Pipes as producing major increases in exhaust flow.

However, the current product page does not publish a controlled stock-exhaust versus Competition-Race-Pipe dyno comparison.

DasMotoring therefore does not advertise a specific horsepower or torque increase for the system.

COMPETITION RACE PIPES VS. CAT BYPASS PIPES

SOUL Competition Race Pipes

• $2,755.00

• Catless

• Valveless

• Eliminates factory muffler architecture

• No quiet mode

• Approximately 8.3 lbs

• Saves approximately 20.9 lbs

• Maximum sound

• Maximum weight reduction

• Maximum simplicity

• Competition-oriented

SOUL Cat Bypass Pipes

• $4,555.00

• Catless

• Retains larger SOUL exhaust valves

• Retains factory rear muffler

• Retains quiet valves-closed operation

• Approximately 11.4 lbs

• Saves approximately 6.9 lbs

• More flexible for mixed street/track use

The Competition Race Pipes are actually less expensive and substantially lighter, but they accomplish that by eliminating the sophisticated valved exhaust functionality retained by the Cat Bypass Pipes.

COMPETITION RACE PIPES VS. SPORT CATALYTIC CONVERTERS

Competition Race Pipes

• $2,755

• Completely catless

• Completely valveless

• No factory muffler path

• 8.3 lbs

• 20.9 lbs saved

• Extremely loud

• Catalyst-related CEL possible

• Competition focused

Sport Catalytic Converters

• $5,515

• 200-cell high-flow catalysts

• Larger 76 mm valves

• Factory muffler retained

• Quiet mode retained

• 16.4 lbs

• 1.9 lbs saved

• Developed for CEL-free operation

• Considerably more street friendly

These products target very different customers despite both increasing flow.

COMPETITION RACE PIPES VS. SPORT CAT RACE PIPES

SOUL also offers Sport Cat Race Pipes.

Both Race Pipe configurations eliminate the factory valve and muffler architecture.

The fundamental difference is:

Competition Race Pipes

• Completely catless

• Lightest configuration

• Greatest weight reduction

• Catalyst-related CEL possible

• More exhaust odor

• $2,755

Sport Cat Race Pipes

• Retain 200-cell high-flow catalytic converters

• Heavier

• Less exhaust odor

• Developed for CEL-free operation

• More street-oriented catalyst behavior

• Higher price

For a customer who wants the Race Pipe architecture but does not want to completely eliminate catalysts, the Sport Cat Race Pipes are the logical alternative.

EMISSIONS / COMPETITION USE NOTE

The SOUL Competition Race Pipes completely remove the GT2 RS's factory catalytic converters.

SOUL states that the product is:

• Not CARB certified

• Intended for closed-course competition / off-road use only

• Potentially illegal for use on emissions-controlled vehicles operated on public roads

United States customers purchasing the product through SOUL are also required to execute SOUL's catless exhaust-component waiver.

Customers are responsible for determining the legality of their vehicle configuration and intended use.

Product Description

The SOUL Sport Catalytic Converters are a high-flow catted performance upgrade for the 2018–2020 Porsche 991.2 911 GT2 RS, replacing the restrictive factory catalyst assemblies with 200-cell high-flow catalytic converters, larger exhaust valves, and optimized outlet geometry.

The factory GT2 RS uses approximately 700-cell catalytic converters. SOUL reduces catalyst density to 200 cells, significantly improving exhaust flow while retaining catalytic converters and avoiding the fumes and catalyst-monitoring concerns associated with a fully catless system.

SOUL also enlarges the exhaust valves from approximately 67 mm factory to 76 mm, while increasing flow toward the direct exhaust-tip outlets when the valves are open. This allows significantly more turbocharger sound and exhaust character to reach the driver while retaining the GT2 RS's factory muffled exhaust path when the valves close.

The complete SOUL assemblies weigh approximately 16.4 lbs compared with 18.3 lbs for the factory components, reducing rear exhaust-system weight by approximately 1.9 lbs / 0.8 kg.

FITMENT:

• Fits 2018–2020 Porsche 991.2 911 GT2 RS

• Designed for the 3.8L twin-turbo flat-six

• Fits standard and Weissach Package vehicles

• Retains the factory rear muffler

• Retains the GT2 RS dual-mode exhaust architecture

• Retains factory exhaust-valve functionality

• Compatible with the factory valve-control strategy

• Compatible with applicable SOUL GT2 RS downstream exhaust components

DETAILS:

• Pair of Sport Catalytic Converters

• Replaces the factory catalytic-converter assemblies

• Retains a catted exhaust configuration

• Upgrades from approximately 700-cell factory catalysts to 200-cell high-flow catalysts

• Designed for increased exhaust flow

• Dramatically increases audible turbocharger sound

• Increases flat-six exhaust character

• Improves performance potential

• Developed for CEL-free operation

• Eliminates the strong exhaust fumes associated with completely catless configurations

• 76 mm SOUL exhaust valves

• Factory exhaust valves approximately 67 mm

• Approximately 13% larger valve diameter

• Approximately 29% greater nominal circular valve area

• Larger outlet pipe than factory

• Increased priority flow toward the exhaust-tip outlets with valves open

• Retains factory muffled route with valves closed

• 2.5-inch diameter tubing

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

• Mandrel-bent tubing

• CNC-cut flanges

• Laser-cut brackets

• Hand-fabricated outlet sections

• Back-purged welds

• Built in thick-gauge aluminum fabrication fixtures

• Approximately 16.4 lbs / 7.4 kg

• Factory components approximately 18.3 lbs / 8.3 kg

• Saves approximately 1.9 lbs / 0.8 kg

• Direct bolt-on installation

• Fixture-tested before shipment

• Designed and built in Willow Grove, Pennsylvania

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

200-CELL HIGH-FLOW CATALYTIC CONVERTERS

The factory GT2 RS uses approximately:

700-cell catalytic converters

SOUL replaces them with:

200-cell high-flow catalytic converters

Reducing catalyst-cell density significantly increases the open flow area available to the exhaust gases leaving the turbochargers.

The result is substantially less restriction while still retaining catalytic converters.

This provides a useful middle ground between:

Factory Catalysts

and

Completely Catless Bypass Pipes

700 CELL VS. 200 CELL

Catalyst cell count describes the density of the catalyst substrate.

The factory approximately 700-cell design provides a comparatively dense matrix through which the exhaust must travel.

SOUL's 200-cell design uses a much more open substrate.

This provides:

• Greater exhaust-flow capacity

• Reduced post-turbo restriction

• Increased turbocharger sound

• Stronger exhaust character

• Greater performance potential

while continuing to route exhaust gases through catalytic-converter material.

RETAINS CATALYTIC CONVERTERS

Unlike the SOUL Cat Bypass Pipes, these Sport Catalytic Converters do not eliminate the catalysts.

This means the exhaust continues to receive catalyst treatment while gaining much of the flow and acoustic benefit associated with a less restrictive catalyst section.

For a GT2 RS that sees substantial street use, the Sport Catalytic Converters provide a more conservative configuration than going completely catless.

DEVELOPED WITHOUT A CHECK ENGINE LIGHT

SOUL specifically developed the Sport Catalytic Converters to provide increased flow and performance without catalyst-related check engine lights.

This is one of the major advantages compared with the Cat Bypass Pipes.

For DasMotoring purposes, this should be understood as SOUL's intended operating behavior rather than an unconditional guarantee for every modified vehicle.

Diagnostic behavior can still potentially be influenced by:

• ECU software

• Oxygen-sensor condition

• Additional engine modifications

• Vehicle condition

• Catalyst condition over time

NO NOXIOUS CATLESS EXHAUST FUMES

SOUL also specifically highlights the ability of the Sport Catalytic Converters to provide the increased turbo sound and flow associated with a freer exhaust without the strong exhaust odor associated with completely catless systems.

This is particularly important for a street-driven GT2 RS where exhaust fumes can become noticeable:

• At idle

• During cold starts

• In traffic

• With windows open

• Inside enclosed garages

• During low-speed maneuvering

LARGER 76 MM EXHAUST VALVES

SOUL does more than change the catalyst substrate.

The replacement assemblies incorporate exhaust valves measuring approximately:

76 mm outside diameter

compared with approximately:

67 mm factory

That represents roughly a:

13% increase in valve diameter

and approximately:

29% more nominal circular area

before accounting for the actual internal geometry of the valve assembly.

This helps prevent the exhaust valve itself from becoming the next major restriction after replacing the factory catalysts.

INCREASED PRIORITY FLOW

SOUL also modifies the routing surrounding the valve and outlet.

With the valves open, additional exhaust flow is directed toward the direct tip outlet.

This increases:

• Exhaust flow

• Turbocharger sound

• Exterior volume

• Flat-six character

• Performance potential

during aggressive operation.

VALVES OPEN

With the exhaust valves open, the Sport Catalytic Converters allow substantially more sound and flow toward the direct rear outlets.

Expect significantly more:

• Turbo spool

• Turbo whistle

• Turbine sound

• High-load engine note

• Acceleration volume

• Exhaust pulse definition

• High-RPM intensity

The lower-density catalysts allow much more of the GT2 RS's turbocharger character to pass through than the approximately 700-cell factory catalysts.

VALVES CLOSED

The GT2 RS retains its quieter operating path.

With the exhaust valves closed, gases continue through the factory rear muffler system.

This significantly reduces sound compared with the valves-open route.

The Sport Catalytic Converters therefore preserve a key advantage of Porsche's original exhaust architecture:

Aggressive when open.

Considerably more restrained when closed.

RETAINS FACTORY VALVE CONTROL

The SOUL assemblies retain the GT2 RS's factory-controlled exhaust-valve functionality.

Porsche's ECU can therefore continue controlling valve position according to its programmed strategy.

Customers wanting independent manual control may choose a compatible aftermarket valve controller, but one is not required for normal operation of the Sport Catalytic Converters.

DRAMATICALLY INCREASED TURBO SOUND

The GT2 RS's factory catalyst substrates absorb a substantial amount of the acoustic energy generated by the turbochargers.

Moving from approximately 700 cells to 200 cells makes the turbochargers considerably easier to hear.

Expect more:

• Turbo spool

• Turbine whistle

• Boost-related sound

• Throttle-transition sound

• Mechanical turbocharger character

SOUL describes the turbos as being clearly audible with the upgraded catalysts.

STRONGER 3.8L FLAT-SIX CHARACTER

The freer catalyst substrate also transmits more of the GT2 RS engine's exhaust character.

Expect:

• Greater acceleration volume

• Deeper and more pronounced engine note

• Increased high-RPM intensity

• Stronger throttle feedback

• More audible shift events

• More prominent deceleration character

The final sound level will depend on the downstream exhaust configuration.

REDUCED POST-TURBO RESTRICTION

The catalytic converters are positioned immediately downstream of the GT2 RS turbochargers.

Reducing restriction in this location gives the turbines a freer exhaust path.

The SOUL Sport Catalytic Converters provide greater post-turbo flow capacity for:

• Factory engine output

• ECU-tuned vehicles

• Increased boost

• Intake upgrades

• Intercooler upgrades

• Higher-output engine builds

2.5-INCH TUBING

The assemblies are constructed around:

2.5-inch-diameter tubing

SOUL uses the same basic large-diameter architecture for both its Sport Catalytic Converters and Cat Bypass Pipe assemblies, with the primary distinction being the presence of the high-flow catalyst substrates.

.065-INCH T304L STAINLESS CONSTRUCTION

SOUL fabricates the assemblies from:

.065-inch-wall T304L stainless steel

This provides:

• High-temperature durability

• Corrosion resistance

• Structural strength

• Long service life

• Consistent fabrication

• Suitability for repeated track heat cycles

CNC-CUT FLANGES

SOUL uses CNC-cut flanges to maintain precise geometry at the exhaust-system interfaces.

Accurate flange geometry helps ensure:

• Proper sealing

• Correct alignment

• Consistent installation

• Long-term durability

LASER-CUT BRACKETS

Precision laser-cut brackets locate and support the Sport Catalytic Converter assemblies within the tight GT2 RS engine compartment.

This helps maintain:

• Correct catalyst positioning

• Valve alignment

• Muffler-path positioning

• Direct-outlet positioning

• Chassis clearance

HAND-FABRICATED OUTLET PIPES

The outlet sections are hand fabricated to accommodate the GT2 RS's unusual dual-flow-path exhaust design.

These sections determine how exhaust is divided between:

• The direct tip outlet

and

• The factory muffled route

The geometry therefore plays an important role in both exhaust flow and sound.

BACK-PURGED WELDS

SOUL back purges the stainless tubing during welding.

Shielding the inside of the tubing helps reduce oxidation and promotes:

• Cleaner internal weld surfaces

• Better weld penetration

• Long-term durability

• Consistent internal exhaust-flow surfaces

THICK-GAUGE ALUMINUM FABRICATION FIXTURES

Each set is built and tested in a thick-gauge aluminum fixture.

The fixture helps prevent warping during fabrication and maintains:

• Flange alignment

• Valve position

• Pipe geometry

• Outlet positioning

• Repeatable vehicle fitment

1.9-LB WEIGHT REDUCTION

SOUL publishes the following component weights:

Factory Catalyst Assemblies:
Approximately 18.3 lbs / 8.3 kg

SOUL Sport Catalytic Converters:
Approximately 16.4 lbs / 7.4 kg

Weight Savings:
Approximately 1.9 lbs / 0.8 kg

That represents approximately a:

10.4% reduction

in the mass of the catalyst assemblies being replaced.

The weight reduction is modest compared with the Cat Bypass Pipes because the Sport Catalytic Converters retain substantial catalyst substrates.

DIRECT BOLT-ON INSTALLATION

The Sport Catalytic Converters are designed as direct replacements for the original Porsche catalyst assemblies.

The system interfaces with the existing:

• Turbocharger outlets

• Rear muffler

• Exhaust-valve controls

• Exhaust-tip flow path

No permanent chassis modification is required for normal installation.

NO ECU TUNE REQUIRED

SOUL does not specify ECU tuning as a requirement for installing the Sport Catalytic Converters.

They are specifically developed to operate with the vehicle's catalyst-monitoring system without producing a check engine light under normal conditions.

ECU calibration may still provide additional performance benefits on modified vehicles, but it is not required simply to install the catalysts.

NO PUBLISHED STANDALONE DYNO NUMBER

SOUL states that the Sport Catalytic Converters increase exhaust flow and power.

However, the current product page does not publish a controlled factory-catalyst versus Sport-Catalyst dyno comparison.

DasMotoring therefore does not advertise a specific horsepower or torque gain from this component alone.

SPORT CATALYTIC CONVERTERS VS. CAT BYPASS PIPES

SOUL Sport Catalytic Converters

• $5,515.00

• 200-cell high-flow catalysts

• Factory catalysts approximately 700-cell

• Retains catalytic converters

• Developed for CEL-free operation

• No catless exhaust fumes

• 76 mm exhaust valves

• 2.5-inch T304L construction

• Approximately 16.4 lbs

• Saves approximately 1.9 lbs

• Street-oriented performance configuration

SOUL Cat Bypass Pipes

• $4,555.00

• Completely catless

• No catalyst substrates

• 76 mm exhaust valves

• 2.5-inch T304L construction

• Approximately 11.4 lbs

• Saves approximately 6.9 lbs

• Greater turbocharger sound

• Lower catalyst-section restriction

• May trigger catalyst-related CELs

• Competition-focused configuration

The Sport Catalytic Converters cost $960 more than the Cat Bypass Pipes while retaining catalysts and avoiding the diagnostic and odor compromises of a completely catless setup.

SPORT CATS VS. FACTORY CATALYSTS

Factory

• Approximately 700-cell catalysts

• 67 mm exhaust valves

• Approximately 18.3 lbs

• Greater exhaust restriction

• Greater turbocharger sound attenuation

SOUL Sport Catalytic Converters

• 200-cell high-flow catalysts

• 76 mm exhaust valves

• Approximately 16.4 lbs

• Reduced post-turbo restriction

• Increased turbocharger sound

• Increased priority flow to the exhaust outlets

• Approximately 1.9 lbs lighter

• Developed for CEL-free operation

EMISSIONS NOTE

The SOUL Sport Catalytic Converters retain catalytic converters but replace Porsche's original catalyst assemblies with aftermarket 200-cell high-flow components.

They should not be represented as original-equipment emissions hardware.

Customers are responsible for determining whether the product and their complete vehicle configuration comply with applicable federal, state, and local regulations.

Product Description

The SOUL Cat Bypass Pipes are a complete catless catalyst-section upgrade for the 2018–2020 Porsche 991.2 911 GT2 RS, engineered to remove the restrictive factory catalytic converters while preserving the GT2 RS's factory-controlled dual-mode exhaust functionality.

Rather than simply replacing the catalysts with straight pipes, SOUL redesigns the complete section using 2.5-inch T304L stainless-steel tubing, larger 76 mm exhaust valves, and enlarged hand-fabricated outlet sections. The factory valves measure approximately 67 mm, giving the SOUL system a substantially larger flow path when the valves are open.

With the valves open, exhaust receives priority flow directly toward the rear exhaust outlets, dramatically increasing turbocharger sound, exhaust volume, and flow. When the valves close, exhaust continues through the factory muffler system, allowing the GT2 RS to retain a considerably more reserved sound level.

The SOUL Cat Bypass Pipes weigh approximately 11.4 lbs compared with 18.3 lbs for the factory catalyst assemblies, saving approximately 6.9 lbs / 3.1 kg from the rear of the vehicle.

FITMENT:

• Fits 2018–2020 Porsche 991.2 911 GT2 RS

• Fits all standard 991.2 GT2 RS vehicles

• Designed for the 3.8L twin-turbo flat-six

• Compatible with the factory rear muffler

• Retains the GT2 RS's valved exhaust architecture

• Compatible with the factory exhaust-valve control strategy

• Compatible with applicable SOUL GT2 RS downstream exhaust upgrades

DETAILS:

• Pair of catless Cat Bypass Pipes

• Completely replaces the factory catalytic-converter assemblies

• Retains dual-mode exhaust functionality

• Larger replacement exhaust valves

• 76 mm SOUL valves

• Factory valves approximately 67 mm

• Increased priority flow toward the exhaust-tip outlets

• 2.5-inch diameter main tubing

• Enlarged outlet geometry

• Increased post-turbo exhaust flow

• Dramatically increased turbocharger sound

• Significantly more aggressive valves-open exhaust character

• Factory muffler continues providing reduced volume with valves closed

• Approximately 11.4 lbs / 5.2 kg

• Factory catalyst components approximately 18.3 lbs / 8.3 kg

• Saves approximately 6.9 lbs / 3.1 kg

• Approximately 38% lighter than the factory components being replaced

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

• Mandrel-bent tubing

• Premium exhaust valves

• Laser-cut brackets

• Hand-fabricated outlet sections

• Back-purged welding

• Thick-gauge aluminum fabrication fixtures

• Direct bolt-on installation

• Fixture-tested before shipment

• May trigger a catalyst-related check engine light

• ECU calibration recommended for catalyst-related CEL management on competition vehicles

• CAD designed

• Hand built in Willow Grove, Pennsylvania

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

COMPLETE CATALYTIC-CONVERTER DELETE

The factory GT2 RS places catalytic converters immediately downstream of its two large turbochargers.

Those catalyst substrates restrict exhaust flow while also absorbing a significant amount of the:

• Turbo spool

• Turbine whistle

• Exhaust pulse

• Flat-six engine character

generated by the 3.8L twin-turbo engine.

SOUL completely removes the catalyst substrates and replaces the assemblies with freer-flowing stainless-steel bypass sections.

The result is a considerably less restrictive exhaust path immediately after the turbochargers.

NOT JUST A STRAIGHT CAT-DELETE PIPE

The GT2 RS Cat Bypass Pipes are more sophisticated than a conventional straight catalyst-delete pipe.

The factory catalyst section is integrated into the vehicle's valved exhaust architecture.

SOUL therefore replaces not only the catalyst section but also incorporates:

• Larger exhaust valves

• Revised flow routing

• Enlarged outlet geometry

• Mounting brackets

• Connections to the factory muffler path

This preserves the GT2 RS's ability to behave very differently depending on valve position.

76 MM SOUL EXHAUST VALVES

SOUL increases exhaust-valve diameter from approximately:

67 mm factory

to:

76 mm SOUL

This represents roughly a:

13% increase in valve diameter

and a substantially greater available flow area when the valve is fully open.

A larger valve reduces the restriction presented at one of the most important junctions in the GT2 RS exhaust.

INCREASED VALVE FLOW AREA

Because cross-sectional area increases with the square of diameter, moving from 67 mm to 76 mm represents approximately:

29% more nominal circular valve area

before accounting for the specific internal geometry of the valve assembly.

This helps explain why SOUL focused not only on removing the catalysts but also on increasing valve size.

The goal is to avoid eliminating catalyst restriction only to leave another unnecessary restriction immediately downstream.

PRIORITY FLOW TO THE EXHAUST OUTLETS

SOUL specifically redesigned the system so that, with the valves open, exhaust receives greater priority toward the direct exhaust-tip outlets.

This increases:

• Exhaust flow

• Exterior volume

• Turbocharger sound

• Engine character

• High-load exhaust presence

The system therefore makes full use of the valves-open operating condition rather than merely replicating the factory routing with the catalyst substrate removed.

VALVES OPEN

When the exhaust valves open, expect a dramatic transformation in the GT2 RS's sound.

The removal of the catalysts allows substantially more:

• Turbo spool

• Turbo whistle

• Turbine sound

• Exhaust pulse

• Flat-six character

• High-RPM exhaust volume

to reach the rear outlets.

SOUL describes the result as a motorsport-inspired roar with a particularly pronounced turbocharger note.

VALVES CLOSED

Despite the aggressive catless configuration, the GT2 RS retains a useful quieter operating mode.

With the valves closed, exhaust continues through the factory rear muffler.

This keeps overall volume and exhaust tone considerably more reserved than the valves-open configuration.

That makes these Cat Bypass Pipes fundamentally different from a completely unmuffled straight-pipe system.

FACTORY-CONTROLLED VALVE BEHAVIOR

Under normal operation, Porsche's ECU continues controlling exhaust-valve behavior.

The vehicle can therefore determine when the valves open or close based on its factory programming.

Customers seeking full manual control over valve position may use a compatible aftermarket valve controller.

This can be particularly useful for drivers who want the valves fully open independently of Porsche's factory strategy.

TURBOCHARGER SOUND

The 991.2 GT2 RS uses a 700-horsepower 3.8L twin-turbocharged flat-six.

The factory catalyst assemblies substantially attenuate the acoustic signature of those turbochargers.

Removing the catalyst substrates makes considerably more of the following audible:

• Compressor and turbine activity

• Turbo spool

• High-load turbine whistle

• Throttle transitions

• Boost-related sound

For many GT2 RS owners, this is one of the most noticeable changes produced by the Cat Bypass Pipes.

MORE AGGRESSIVE FLAT-SIX CHARACTER

The catalyst removal also allows more combustion and exhaust-pulse energy to reach the rear of the vehicle.

Expect:

• Louder acceleration

• More high-RPM intensity

• Greater throttle-related feedback

• Stronger shift events

• More pronounced deceleration behavior

• Increased motorsport character

Overall sound will depend on what downstream muffler or exhaust system is installed.

2.5-INCH MAIN TUBING

SOUL constructs the primary bypass sections from:

2.5-inch-diameter tubing

The design is focused on maximizing the available flow through the catalyst section while maintaining proper packaging around the GT2 RS's turbocharger and rear-exhaust architecture.

ENLARGED OUTLET DESIGN

In addition to the larger 76 mm valves, SOUL enlarges the exhaust outlet geometry leading toward the rear tip path.

The goal is to increase flow through the path that becomes active when the exhaust valves open.

This works together with:

• Catalyst deletion

• Larger valves

• Revised internal routing

• CAD-developed geometry

to reduce restriction throughout the complete assembly.

REDUCED POST-TURBO RESTRICTION

The turbine side of each turbocharger must discharge exhaust into the downstream exhaust system.

Removing restrictive catalyst substrates reduces the pressure the exhaust encounters immediately downstream of the turbine.

This provides additional exhaust-flow capacity for:

• Factory power levels

• ECU-tuned vehicles

• Increased boost

• Higher-output builds

• Modified intake and cooling systems

• Other supporting engine upgrades

6.9-LB WEIGHT REDUCTION

SOUL publishes the following weights:

Factory Catalyst Assemblies:
Approximately 18.3 lbs / 8.3 kg

SOUL Cat Bypass Pipes:
Approximately 11.4 lbs / 5.2 kg

Weight Savings:
Approximately 6.9 lbs / 3.1 kg

This represents approximately a:

38% reduction

in the weight of the components being replaced.

Because the components are positioned at the rear of a rear-engined vehicle, the weight reduction is particularly useful for a track-focused platform such as the GT2 RS.

.065-INCH T304L STAINLESS CONSTRUCTION

The Cat Bypass Pipes are fabricated from:

.065-inch-wall T304L stainless steel

T304L provides:

• High-temperature durability

• Corrosion resistance

• Structural strength

• Consistent fabrication characteristics

• Long service life

• Suitability for repeated track heat cycles

MANDREL-BENT TUBING

The tubing is mandrel bent to maintain the intended internal cross-sectional area through bends.

This helps preserve:

• Consistent exhaust diameter

• Smooth flow paths

• Exhaust-gas velocity

• Predictable fitment

HAND-FABRICATED OUTLET PIPES

SOUL hand fabricates the outlet sections to create the geometry required around the GT2 RS's valved exhaust layout.

These outlet sections are particularly important because they control how exhaust is divided between the direct outlet and factory muffled route.

PREMIUM EXHAUST VALVES

The SOUL assemblies incorporate their own larger premium exhaust valves as part of the replacement catalyst sections.

The valves are therefore an integrated part of the Cat Bypass Pipe design rather than a separate accessory.

LASER-CUT BRACKETS

Precision laser-cut brackets are used to locate and support the assemblies within the tight packaging of the GT2 RS rear chassis.

Accurate bracket geometry helps maintain:

• Exhaust alignment

• Valve alignment

• Muffler-path positioning

• Tip-path positioning

• Chassis clearance

BACK-PURGED WELDING

SOUL back purges the tubing during welding.

Protecting the interior of the stainless tubing with shielding gas helps prevent excessive oxidation and promotes:

• Cleaner internal weld surfaces

• Proper weld penetration

• Improved long-term durability

• Consistent exhaust flow

THICK-GAUGE ALUMINUM FABRICATION FIXTURES

Each set is constructed in a thick-gauge aluminum fixture.

The fixture helps act as a heat sink during fabrication and reduces distortion caused by the substantial heat introduced during welding.

This helps maintain:

• Valve position

• Flange alignment

• Pipe geometry

• Outlet positioning

• Repeatable vehicle fitment

FIXTURE-TESTED BEFORE SHIPPING

Each completed assembly undergoes a fitment and quality-control inspection before shipment.

SOUL verifies the system in its production fixture and foam packs the finished components to protect them during transport.

DIRECT BOLT-ON INSTALLATION

The Cat Bypass Pipes are designed to replace the factory catalyst assemblies without requiring permanent chassis modification.

No cutting or welding should be necessary during normal installation.

The system interfaces with the vehicle's existing:

• Turbocharger outlets

• Rear exhaust

• Muffler architecture

• Exhaust-valve controls

CHECK ENGINE LIGHT

Because the SOUL Cat Bypass Pipes completely remove the factory catalytic converters, the vehicle may detect that catalyst functionality is no longer present.

SOUL explicitly states that the product:

may trigger a check engine light.

DasMotoring therefore does not advertise this product as CEL-free.

ECU TUNING

An ECU calibration is not required for the physical installation of the Cat Bypass Pipes.

However, SOUL recommends an appropriate custom ECU calibration to address catalyst-related diagnostic faults on vehicles used for track or competition purposes.

Tuning may also allow the engine calibration to take greater advantage of the reduced post-turbo restriction.

NO PUBLISHED STANDALONE DYNO NUMBER

SOUL states that the revised system increases exhaust flow and power potential.

However, the current product page does not publish a controlled factory-catalyst versus Cat-Bypass before-and-after dyno comparison.

DasMotoring therefore does not advertise a specific horsepower or torque gain for this product alone.

CAT BYPASS PIPES VS. SPORT CATALYTIC CONVERTERS

SOUL Cat Bypass Pipes

• $4,555.00

• Completely catless

• 2.5-inch T304L main tubing

• 76 mm exhaust valves

• Maximum catalyst-section sound

• Maximum catalyst-section flow

• Approximately 11.4 lbs

• Saves approximately 6.9 lbs

• May trigger catalyst-related CELs

• Competition-oriented configuration

SOUL Sport Catalytic Converters

• Retain high-flow catalytic converters

• Retain dual-mode valve functionality

• More conservative emissions configuration

• Increased flow compared with the factory catalysts

• Less aggressive turbocharger sound

• Greater purchase price

• More street-oriented configuration

For customers prioritizing maximum sound, flow, and weight reduction, the Cat Bypass Pipes are the more aggressive option.

CAT BYPASS PIPES VS. RACE PIPES

SOUL also offers separate Race Pipes for the 991.2 GT2 RS.

The Cat Bypass Pipes replace the catalyst sections while retaining the factory-style dual-path exhaust architecture and valves.

The Race Pipes are a separate downstream component and should not be confused with these catalyst-delete assemblies.

The two components can be selected independently depending on the customer's desired sound, flow, and overall exhaust configuration.

EMISSIONS / COMPETITION USE NOTE

The SOUL Cat Bypass Pipes completely remove the factory catalytic converters.

This configuration is intended for closed-course / competition use where catalyst retention is not required.

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

Customers are responsible for determining the legality of their complete vehicle configuration and intended use.