Porsche 991.2 GT2 RS SOUL Sport Catalytic Converters

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.