Porsche 991.1 Carrera / Carrera 4 3.4L Without PSE SOUL Long Tube Competition Headers

Product Description

The SOUL Long Tube Competition Headers are designed for Porsche 991.1 Carrera owners seeking maximum exhaust flow, increased engine response, reduced exhaust restriction, lower operating temperatures, and a substantially more aggressive naturally aspirated flat-six sound.

SOUL replaces the heavy and restrictive factory manifold and catalytic-converter assemblies with a dedicated catless long-tube header system constructed from T304L stainless steel. Port-matched flanges, smooth-radius primary tubing, and performance-oriented collectors work together to improve exhaust-gas flow from the cylinder heads into the downstream exhaust.

Long-tube runners and equal collector inputs are designed to improve scavenging and high-RPM breathing while maintaining the durability required for both aggressive street and track use.

This DasMotoring listing is specifically organized for 3.4L 991.1 Carrera Base models without Porsche Sport Exhaust / PSE, while the physical SOUL header assembly is compatible across the broader 991.1 Carrera platform.

FITMENT:

• Fits 2012–2016 Porsche 991.1 911 Carrera Coupe – 3.4L – Without PSE

• Fits 2012–2016 Porsche 991.1 911 Carrera Cabriolet – 3.4L – Without PSE

• Fits 2012–2016 Porsche 991.1 911 Carrera 4 Coupe – 3.4L – Without PSE

• Fits 2012–2016 Porsche 991.1 911 Carrera 4 Cabriolet – 3.4L – Without PSE

• Fits applicable 991.1 Targa 4 3.4L models without PSE

• Compatible with factory non-PSE rear exhaust systems

• Compatible with applicable SOUL rear exhaust upgrades

• Compatible with manual and PDK-equipped vehicles where applicable

• Porsche Sport Exhaust / PSE is not required

• SOUL specifies the physical header assembly for all Porsche 991.1 Carrera models from 2012–2016

DETAILS:

• Direct-replacement Long Tube Competition Header upgrade

• Completely catless

• Removes the factory catalytic converters

• Designed for maximum exhaust flow

• Designed to improve throttle response

• Designed to improve engine response

• Reduces restriction compared with the factory manifolds

• Reduces exhaust-system weight compared with the factory header and catalyst assemblies

• Reduces operating temperatures compared with the factory catalyst-equipped manifolds

• Long-tube runner architecture

• Smooth-radius primary tubing

• Port-matched exhaust flanges

• Performance-oriented collector geometry

• Equal collector inputs from each primary runner

• Premium collector design

• Designed to maximize naturally aspirated exhaust scavenging

• Produces substantially more aggressive flat-six sound

• Constructed from T304L stainless steel

• Precision-fabricated construction

• Every header set undergoes quality-control inspection before shipment

• Every set is fixture-tested for proper fitment

• Foam-packed following final inspection

• Direct bolt-on installation

• Installation instructions included

• Developed to withstand demanding street and track use

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

CATLESS LONG-TUBE DESIGN:

The factory 991.1 Carrera exhaust manifolds must satisfy manufacturing cost, packaging, emissions, noise, and durability requirements.

The result is an assembly that uses:

• Compact factory manifold geometry

• Pressed exhaust flanges

• Restrictive primary-tube shapes

• Generic collector architecture

• Large factory catalytic converters

SOUL's Competition Headers remove these compromises and replace the factory assembly with a dedicated performance-oriented long-tube system.

The result is a much freer path from the cylinder heads into the downstream exhaust.

LONG-TUBE RUNNERS:

Long-tube headers allow the exhaust system to make better use of exhaust-pulse energy than a compact factory manifold.

Runner length and collector location influence:

• Exhaust scavenging

• Exhaust-gas velocity

• Cylinder evacuation

• Throttle response

• Midrange performance

• High-RPM breathing

SOUL uses long runners combined with smooth-radius bends to maintain a cleaner path through the exhaust system.

PORT-MATCHED FLANGES:

The transition between the cylinder-head exhaust port and the header primary is critical to efficient exhaust flow.

SOUL uses port-matched flanges intended to minimize abrupt steps and restrictions as exhaust gases leave the cylinder head.

A smoother transition helps maintain gas velocity and reduces turbulence entering the primary tubes.

PERFORMANCE-ORIENTED COLLECTORS:

The individual primary runners converge through SOUL's dedicated collector design.

SOUL specifically uses equal inputs from each primary runner to promote a smoother and more balanced convergence of exhaust flow.

The collector architecture is designed to improve:

• Exhaust-flow efficiency

• Pulse interaction

• Scavenging

• Engine response

• High-RPM performance

This is particularly important on the naturally aspirated Carrera engine, where exhaust-pulse tuning plays a direct role in cylinder filling and evacuation.

MAXIMUM EXHAUST FLOW:

The Competition Headers completely remove the factory catalytic converters.

This eliminates one of the largest restrictions in the original exhaust system and creates a much freer path downstream of the engine.

Benefits include:

• Reduced exhaust backpressure

• Increased exhaust-flow capacity

• Improved high-RPM breathing

• Sharper throttle response

• Greater performance potential

• Increased exhaust volume

• Stronger mechanical engine character

LOWER OPERATING TEMPERATURES:

Catalytic converters operate at extremely high temperatures and retain considerable heat within the exhaust system.

Removing the factory catalytic converters reduces a major heat source immediately downstream of the engine.

SOUL specifically highlights decreased operating temperatures as one of the benefits of the Competition Header configuration.

This can be particularly useful on vehicles subjected to repeated high-load or track operation.

WEIGHT REDUCTION:

The factory header assemblies include large and heavy catalytic converters.

The Competition Headers eliminate this catalyst mass entirely.

SOUL specifically identifies weight savings as one of the benefits of the system.

However, SOUL does not currently publish a verified numerical factory-versus-Competition-header weight comparison, so DasMotoring does not advertise an unsupported pound figure.

SOUND CHARACTER:

Removing the factory catalytic converters makes a significant difference in the 991.1 Carrera's exhaust character.

Expect:

• Increased naturally aspirated flat-six volume

• Deeper low-RPM tone

• Stronger midrange exhaust presence

• Greater mechanical character

• Increased throttle-related sound

• More aggressive high-RPM wail

• Greater exhaust intensity approaching redline

• Significantly more sound than the catted Street Headers

The final volume and tone depend heavily on the rear exhaust installed downstream.

WITH FACTORY NON-PSE REAR EXHAUST:

The Competition Headers can be installed while retaining the Base Carrera's factory non-PSE rear mufflers.

This creates an interesting combination for owners who want significantly greater exhaust flow and flat-six character without simultaneously replacing the entire rear exhaust.

This configuration retains:

• Factory non-PSE rear mufflers

• Original rear-exhaust architecture

• Original rear tips

while gaining:

• Catless long-tube headers

• Reduced upstream restriction

• Increased sound

• Improved engine response

• Reduced catalyst-related heat

PSE IS NOT REQUIRED:

Porsche Sport Exhaust is not required for these headers.

The headers are installed upstream of the rear muffler system and are not dependent on the vehicle being equipped with PSE.

There is therefore no unique Competition Header version for PSE versus non-PSE vehicles.

This listing is categorized specifically for 991.1 Carrera Base Without PSE customers, but the underlying SOUL header assembly fits the broader 991.1 Carrera platform.

RR RACING SUPERCHARGER COMPATIBILITY:

SOUL specifically developed and tested its catless header solution in conjunction with RR Racing's 991 Carrera Supercharger Kit.

The reduced exhaust restriction and elimination of the catalytic converters make the Competition Headers particularly well suited to higher-output applications where exhaust-flow capacity and thermal management become increasingly important.

For naturally aspirated cars, the same freer-flowing architecture provides increased exhaust response and sound.

CHECK ENGINE LIGHT:

The Competition Headers may trigger a check engine light.

The factory catalytic converters are completely removed.

The vehicle's oxygen-sensor and catalyst-monitoring strategy may therefore detect that the original emissions equipment is no longer present.

SOUL recommends an appropriate custom ECU calibration to disable catalyst-related diagnostic faults for track applications.

ECU TUNING:

A custom ECU calibration is strongly recommended when using the Competition Headers.

An appropriate tune can:

• Address catalyst-related check engine lights

• Optimize ignition timing

• Optimize fueling

• Take greater advantage of reduced exhaust restriction

• Support additional engine modifications

• Improve integration with forced-induction applications

The headers can physically be installed without a tune, but catalyst-related faults may occur.

COMPETITION HEADERS VS. STREET HEADERS:

Long Tube Competition Headers

• $3,055.00

• Completely catless

• Maximum exhaust flow

• Maximum header-induced sound

• Lower exhaust-system weight

• Reduced catalyst-related heat

• May trigger a check engine light

• Custom ECU calibration recommended

• Intended for off-road / competition applications

Long Tube Street Headers

• $4,855.00

• 300-cell performance catalytic converters

• More street-oriented configuration

• Designed around normal factory ECU operation

• Less aggressive exhaust volume

• Reduced emissions-related diagnostic concerns

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

EMISSIONS / COMPETITION USE NOTE:

The SOUL Long Tube Competition Headers completely remove the factory catalytic converters.

This product is not CARB certified and is intended for off-road / competition use only due to removal of factory emissions-control equipment.

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.