Porsche 991.2 GT2 RS SOUL Sport Cat Race Pipes

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.