Fabspeed

Fabspeed Sport Catalytic Converters With GT2RS Style Outlets + Muffler Adapter.

The Fabspeed Sport Catalytic Converters with GT2RS Style Outlets + Muffler Adapter are a high-performance exhaust upgrade for the Porsche 911 992 Carrera, designed to reduce exhaust restriction, improve turbo response and deliver a significantly more sporting exhaust character.

Fits:

• Porsche 992.1 Carrera 2 3.0L 2021-24
• Porsche 992.1 Carrera 4 3.0L 2021-24
• Porsche 992.1 Carrera 2 Cabriolet 3.0L 2021-24
• Porsche 992.1 Carrera 4 Cabriolet 3.0L 2021-24
• Porsche 992.2 Carrera 2 3.0L 2024>>  

The system replaces the restrictive factory catalytic converters with German HJS 200-CPSI high-flow catalytic converters and incorporates GT2RS-inspired direct exhaust outlets with muffler adapter. This configuration creates a freer-flowing path for exhaust gases after the turbochargers while retaining catalytic exhaust treatment.

Manufactured from CNC mandrel-bent 14–16 gauge T304L stainless steel, the system is engineered as a direct bolt-on installation with no cutting or welding required.

What This Product Does:

• Replaces the factory catalytic-converter assemblies.
• Replaces the restrictive original 800-cell catalysts with HJS 200-CPSI units.
• Reduces exhaust backpressure.
• Allows exhaust gases to leave the turbochargers more efficiently.
• Helps improve turbocharger response.
• Supports increased horsepower and torque.
• Creates a more aggressive sports-car exhaust note.
• Increases audible turbocharger sound.
• Uses GT2RS-inspired direct exhaust outlets.
• Retains catalytic exhaust treatment.
• Reduces exhaust-system weight.
• Provides a modular design that can be converted back to a muffled configuration.
• Retains compatibility with the factory muffler using optional adapter pipes.
• Can also be configured with Fabspeed's Valvetronic exhaust.
• Provides a bolt-on installation without cutting or welding.

Fabspeed's HJS catalysts use a much more open internal structure than the original 800-cell units, helping the turbocharged 992 engine move exhaust gases more efficiently.

Symptoms Of Wear Or Failure:
The Fabspeed system is primarily a performance upgrade, but replacement may also be appropriate when the original catalytic converters have deteriorated.

Possible symptoms of a failing or restricted catalyst include:

• Reduced engine power.
• Sluggish acceleration.
• Increased turbo lag.
• Poor throttle response.
• Engine feeling restricted at higher RPM.
• Difficulty producing normal power under heavy load.
• Check engine warning light.
• Catalyst-efficiency fault codes.
• Rattling or metallic noises from inside a catalytic converter.
• Excessive heat from the catalyst housing.
• Strong or unusual exhaust odours.
• Increased emissions.
• Failed emissions testing.
• Exhaust leaks around joints or flanges.
• Visible damage to the catalyst housing.
• Poor fuel economy.
• Abnormally high exhaust backpressure.

A partially blocked catalyst may be relatively difficult to notice during light driving but become increasingly restrictive as exhaust-gas volume rises under acceleration.

Why Replacement Matters:
Catalytic converters sit directly downstream of the turbochargers and therefore have a significant influence on exhaust flow.

If the internal substrate becomes damaged, contaminated, melted or partially blocked, exhaust gases cannot pass through efficiently.

This increases backpressure and can result in:

• Reduced engine performance.
• Slower turbo response.
• Increased exhaust temperatures.
• Poor high-RPM performance.
• Increased load on the turbocharged exhaust system.
• Engine-management faults.
• Reduced emissions-control effectiveness.

Replacing a damaged or restrictive catalyst restores a clear exhaust path and proper catalytic function.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

FSPOR992SCGT2WC

The product you are viewing cross references to these numbers

Fabspeed Sport Catalytic Converters With Muffler Adapter Only. 

The Fabspeed Sport Catalytic Converters With Muffler Adapter Only are a high-performance exhaust upgrade for the Porsche 911 992 Carrera, designed to reduce exhaust restriction, improve turbo response and deliver a significantly more sporting exhaust character.

Fits:

• Porsche 992.1 Carrera 2 3.0L 2021-24
• Porsche 992.1 Carrera 4 3.0L 2021-24
• Porsche 992.1 Carrera 2 Cabriolet 3.0L 2021-24
• Porsche 992.1 Carrera 4 Cabriolet 3.0L 2021-24
• Porsche 992.2 Carrera 2 3.0L 2024>>  

The system replaces the restrictive factory catalytic converters with German HJS 200-CPSI high-flow catalytic converters. This configuration creates a freer-flowing path for exhaust gases after the turbochargers while retaining catalytic exhaust treatment.

Fabspeed's modular design also provides flexibility. The adapter pipes, allow the sport catalysts to be used with the factory rear muffler or Fabspeed Valvetronic exhaust if a quieter configuration is preferred.

Manufactured from CNC mandrel-bent 14–16 gauge T304L stainless steel, the system is engineered as a direct bolt-on installation with no cutting or welding required.

What This Product Does:

• Replaces the factory catalytic-converter assemblies.
• Replaces the restrictive original 800-cell catalysts with HJS 200-CPSI units.
• Reduces exhaust backpressure.
• Allows exhaust gases to leave the turbochargers more efficiently.
• Helps improve turbocharger response.
• Supports increased horsepower and torque.
• Creates a more aggressive sports-car exhaust note.
• Increases audible turbocharger sound.
• Retains catalytic exhaust treatment.
• Reduces exhaust-system weight.
• Provides a modular design that can be converted back to a muffled configuration.
• Retains compatibility with the factory muffler using optional adapter pipes.
• Can also be configured with Fabspeed's Valvetronic exhaust.
• Provides a bolt-on installation without cutting or welding.

Fabspeed's HJS catalysts use a much more open internal structure than the original 800-cell units, helping the turbocharged 992 engine move exhaust gases more efficiently.

Symptoms Of Wear Or Failure:
The Fabspeed system is primarily a performance upgrade, but replacement may also be appropriate when the original catalytic converters have deteriorated.

Possible symptoms of a failing or restricted catalyst include:

• Reduced engine power.
• Sluggish acceleration.
• Increased turbo lag.
• Poor throttle response.
• Engine feeling restricted at higher RPM.
• Difficulty producing normal power under heavy load.
• Check engine warning light.
• Catalyst-efficiency fault codes.
• Rattling or metallic noises from inside a catalytic converter.
• Excessive heat from the catalyst housing.
• Strong or unusual exhaust odours.
• Increased emissions.
• Failed emissions testing.
• Exhaust leaks around joints or flanges.
• Visible damage to the catalyst housing.
• Poor fuel economy.
• Abnormally high exhaust backpressure.

A partially blocked catalyst may be relatively difficult to notice during light driving but become increasingly restrictive as exhaust-gas volume rises under acceleration.

Why Replacement Matters:
Catalytic converters sit directly downstream of the turbochargers and therefore have a significant influence on exhaust flow.

If the internal substrate becomes damaged, contaminated, melted or partially blocked, exhaust gases cannot pass through efficiently.

This increases backpressure and can result in:

• Reduced engine performance.
• Slower turbo response.
• Increased exhaust temperatures.
• Poor high-RPM performance.
• Increased load on the turbocharged exhaust system.
• Engine-management faults.
• Reduced emissions-control effectiveness.

Replacing a damaged or restrictive catalyst restores a clear exhaust path and proper catalytic function.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

FSPOR992SCGT2C

The product you are viewing cross references to these numbers

Fabspeed XperTune Performance Software ECU Upgrade.

The Fabspeed XperTune Performance Software is a custom ECU calibration developed for the Porsche 996 GT2 3.6L, 2001–2005. Designed to optimise the factory engine-management strategy, the software recalibrates key parameters such as fuelling, sensor inputs and boost control to improve horsepower, torque, throttle response and overall drivability.

Fits:

• Porsche 996 GT2 2001-05

Rather than requiring the vehicle's ECU to be removed and sent away for bench flashing, the XperTune system uses a supplied handheld programming device connected through the vehicle's OBD-II port. The original ECU data is read from the vehicle and used by Fabspeed to create a calibration matched to the vehicle's specification and modifications.

Fabspeed publishes output figures of 505 hp and 502 lb-ft compared with its quoted stock figures of 450 hp and 457 lb-ft, representing claimed gains of approximately 55 hp and 45 lb-ft. Actual results can vary according to vehicle condition, fuel quality, modifications and operating conditions.

What This Product Does:

• Reprograms the engine ECU with a performance-oriented calibration.
• Optimises engine-management parameters for increased performance.
• Adjusts fuelling strategies to suit the engine and vehicle specification.
• Optimises boost-pressure control where applicable.
• Improves throttle response and engine drivability.
• Supports increased horsepower and torque.
• Allows the calibration to be tailored to existing vehicle modifications.
• Removes the need to physically remove and ship the ECU for tuning.
• Allows the factory calibration to be restored using the supplied handheld device.
• Provides a reusable programming method for switching between the original and Fabspeed calibration on the same vehicle.

The tune is created using the original ECU file together with information about the vehicle and any installed performance modifications.

When XperTune Should Be Considered:
This software may be appropriate when:

• Additional horsepower and torque are desired.
• The vehicle remains mechanically healthy but improved performance is required.
• Performance exhaust components have been installed.
• Intake or intercooler upgrades have been fitted.
• The ECU needs to be calibrated around existing modifications.
• Improved throttle response is desired.
• The owner wants an OBD-II flashing solution without removing the ECU.
• The ability to return the vehicle to its original calibration is desirable.

How The Tuning Process Works:
The supplied handheld programmer connects to the Porsche through the OBD-II diagnostic port.

The process involves:

• Reading the factory ECU data using the handheld programmer.
• Connecting the handheld device to a Windows PC.
• Supplying the original ECU data and vehicle specification to Fabspeed.
• Fabspeed creating a calibration based on the supplied vehicle information.
• Loading the custom tune onto the handheld programmer.
• Flashing the new calibration into the vehicle ECU through the OBD-II port.

The original calibration remains available so the ECU can later be returned to stock using the handheld device.

Fabspeed RENNKRAFT Modular Headers With HJS Catalytic Converters.

The Fabspeed RENNKRAFT Modular Headers with HJS Catalytic Converters are a high-performance exhaust manifold and catalyst upgrade developed for the Porsche 911 997.2 Carrera.

Fits:

• Porsche 997 MKII Carrera C2 3.6L 2009-12
• Porsche 997 MKII Carrera C4 3.6L 2009-12  

Designed to replace the factory header and catalytic-converter assemblies, the system combines freer-flowing tubular headers with German-made HJS HD tri-metallic 200-cell high-flow catalytic converters. The objective is to improve exhaust scavenging, reduce restriction and enhance engine response while retaining catalytic exhaust-gas treatment.

Fabspeed's patented RENNKRAFT modular design uses quick-release V-band connections between the headers and catalyst sections. This allows the HJS sport catalysts to be removed independently if servicing is required and enables compatible QUICKTRACK cat-bypass sections to be installed for appropriate track-only competition use.

The headers are manufactured from CNC mandrel-bent T304L stainless steel and use high-velocity merge collectors designed to improve exhaust-gas scavenging. Fabspeed states performance gains of approximately 25 hp and 20 lb-ft of torque on its development application, although actual results will vary according to vehicle condition, specification, fuel, exhaust configuration and operating conditions.

What This Product Does:

• Replaces the original exhaust manifolds and catalytic-converter sections.
• Improves the path for exhaust gases leaving the cylinder heads.
• Uses performance-oriented merge collectors to improve exhaust scavenging.
• Reduces restriction compared with the standard exhaust arrangement.
• Uses HJS 200-cell high-flow catalysts for improved gas flow.
• Helps improve throttle response and engine breathing.
• Can support increased horsepower and torque.
• Produces a sportier and more defined exhaust note.
• Enhances off-throttle burbles and higher-frequency exhaust tones.
• Retains catalytic exhaust-gas treatment when the HJS sport cats are fitted.
• Provides individually replaceable catalyst sections.
• Uses V-band connections for easier servicing and configuration changes.
• Allows compatible track-only bypass sections to be fitted without replacing the complete header assembly.
• Works with exhaust systems designed to connect to the factory-style Porsche header location.

Fabspeed states that the HJS catalyst configuration flows approximately 90–93% of an equivalent straight pipe, providing high exhaust-flow capacity while retaining a catalytic substrate.

Symptoms Of Wear Or Failure:
The original exhaust system is exposed to continuous heat cycles, vibration, moisture and corrosive exhaust gases. Over time, the manifolds, joints and catalytic converters can deteriorate.

Possible symptoms include:

• Exhaust ticking or tapping noises, especially when cold.
• Exhaust leaks around header flanges or joints.
• Soot deposits around leaking connections.
• Increased exhaust noise.
• Exhaust fumes or unusual smells around the rear of the vehicle.
• Loss of engine performance.
• Poor throttle response.
• Engine feeling restricted at higher RPM.
• Increased fuel consumption.
• Check engine warning light.
• Catalyst-efficiency fault codes.
• Rattling from inside a catalytic converter.
• Metallic noises caused by a loose catalyst substrate.
• Excessive heat around one catalytic converter.
• Failed emissions testing.
• Cracked or damaged exhaust manifolds.
• Corroded exhaust hardware or flanges.
• Damaged catalyst substrate caused by overheating or misfires.

A partially restricted catalytic converter may cause relatively normal operation at low engine speeds but increasingly restrict the engine as airflow demand rises.

Why Replacement Matters:
The exhaust headers and catalytic converters are positioned directly in the path of exhaust gases leaving the engine.

If a manifold develops a leak, exhaust gases can escape before reaching the remainder of the exhaust system. This can affect noise, emissions and engine-management readings.

If a catalytic converter becomes internally damaged or restricted, exhaust backpressure can increase. The engine then has to work harder to push exhaust gases out of the cylinders, potentially reducing performance.

Replacing worn or restrictive components can help restore:

• Efficient exhaust flow.
• Strong throttle response.
• Consistent engine performance.
• Proper catalytic-converter operation.
• Reliable exhaust sealing.
• Correct exhaust sound.
• Reduced unwanted exhaust leakage.
• More effective engine breathing.

A performance header and sport-cat system can also reduce restriction beyond the level offered by the original components.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

FSPOR9972MHSC

The product you are viewing cross references to these numbers

Fabspeed RENNKRAFT Sport Cat And Comp.

The Fabspeed RENNKRAFT Sport Cat and Competition Link Pipe system is a performance exhaust upgrade designed for the Porsche 964 Turbo. It replaces the restrictive original catalytic converter section with Fabspeed's interchangeable RENNKRAFT system, allowing the exhaust configuration to be changed between an HJS 200-cell high-flow sport catalytic converter and a straight-through competition link pipe.

Fits:

• Porsche 964 (911) TURBO 3.3L 1990-94
• Porsche 964 (911) TURBO 3.6L 1990-94  

The sport catalyst configuration is designed to improve exhaust flow while retaining catalytic exhaust-gas treatment, while the competition link pipe provides the least restrictive exhaust path for appropriate track and competition use.

The system retains the original Porsche rear mufflers, allowing the vehicle to preserve a largely factory rear appearance while benefiting from reduced exhaust restriction, a stronger exhaust character and more noticeable turbocharger sound.

Constructed from 3-inch, 14–16 gauge T304L stainless-steel tubing, the system uses CNC mandrel bends to maintain a smooth internal exhaust path and provide durability under the high temperatures generated by the turbocharged flat-six engine.

What This Product Does:

• Replaces the restrictive original catalytic-converter section.
• Provides interchangeable sport-cat and competition-pipe configurations.
• Uses a high-flow HJS 200-cell catalytic converter in the catted configuration.
• Reduces exhaust restriction after the turbocharger.
• Helps improve exhaust-gas flow.
• Can help reduce turbo lag.
• Supports improved turbocharger response.
• Produces a more pronounced exhaust note.
• Increases audible turbo whistle.
• Retains the original Porsche rear mufflers.
• Allows the vehicle to maintain a relatively factory-looking rear exhaust installation.
• Provides a straight-through competition configuration for suitable track applications.
• Uses stainless-steel construction for long-term corrosion resistance.
• Provides a direct replacement for the factory catalytic-converter section.

Fabspeed states that the HJS 200-cell catalyst flows approximately 93% as much as a straight pipe, providing a balance between catalytic treatment and performance-oriented exhaust flow.

Symptoms Of Wear Or Failure:
A Porsche 964 Turbo's original catalytic converter can deteriorate after decades of heat cycles, vibration and exposure to high exhaust temperatures.

Possible signs of deterioration or restriction include:

• Reduced engine power.
• Sluggish acceleration.
• Slow turbo response.
• Increased turbo lag.
• Engine feeling restricted at higher RPM.
• Poor performance under heavy load.
• Excessive exhaust backpressure.
• Increased exhaust-gas temperatures.
• Unusual heat around the catalytic converter.
• Rattling from inside the converter.
• Metallic noises caused by a loose catalyst substrate.
• Strong or unusual exhaust smells.
• Failed emissions testing.
• Increased exhaust emissions.
• Visible corrosion or damage to the converter housing.
• Exhaust leaks around flanges or joints.

A partially blocked catalyst may allow relatively normal operation at low engine speeds but increasingly restrict exhaust flow as engine speed and load increase.

Why Replacement Matters:
The catalytic converter sits directly downstream within the turbocharged exhaust system, meaning its ability to flow exhaust gases can have a significant influence on engine and turbocharger performance.

As an old catalyst deteriorates, its internal substrate can:

• Break apart.
• Become contaminated.
• Melt or deform.
• Collapse internally.
• Become increasingly restrictive.

A restricted catalyst creates additional pressure after the turbocharger, making it more difficult for exhaust gases to leave the turbine efficiently.

Replacing an ageing or restrictive factory catalyst with a correctly designed high-flow system can help restore:

• Efficient exhaust flow.
• Turbocharger response.
• Throttle response.
• High-RPM performance.
• Correct exhaust-system operation.
• More consistent engine performance.
• A stronger performance exhaust character.

NOTE: In the United Kingdom, sports catalytic converters and bypass pipes do not have type approval and are not legally permitted for use on vehicles manufactured after 1st March 2001. They are not MOT compliant and cannot be used on public roads. These components are intended solely for race and track use.

For vehicles manufactured before 1st March 2001, a non-type approved sports catalytic converter may be fitted, provided it offers comparable performance to the original and the vehicle continues to meet the applicable emissions standards for its age. The vehicle must still pass an MOT test.

If you are located outside the UK, please check your local laws and regulations to ensure compliance.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

FSPOR964TSCCB

The product you are viewing cross references to these numbers

Fabspeed HJS High flow Sport Cat. 

The Fabspeed HJS High-Flow Sport Catalytic Converter is a performance exhaust upgrade for the Porsche 964 Turbo, C2 Turbo designed to replace an ageing, restrictive or previously removed original catalytic converter.

Fits:

• Porsche 964 (911) TURBO 3.3L 1990-94
• Porsche 964 (911) TURBO 3.6L 1990-94

At the heart of the system is a 200-cell HJS high-flow catalytic converter, engineered to reduce exhaust emissions while providing substantially less restriction than older factory catalyst technology. The system is manufactured using 14–16 gauge CNC mandrel-bent T304L stainless steel, providing a durable, corrosion-resistant exhaust path designed for improved gas flow.

By reducing exhaust restriction after the turbocharger, the sport catalyst can help the turbocharged flat-six breathe more efficiently, supporting improved throttle response and performance while retaining catalytic exhaust-gas treatment.

What This Product Does:

• Replaces the original catalytic converter section.
• Converts harmful exhaust pollutants before gases leave the exhaust system.
• Provides significantly greater exhaust flow than an ageing or restrictive factory catalyst.
• Reduces exhaust backpressure after the turbocharger.
• Helps improve throttle response.
• Can support improved turbo response and engine performance.
• Provides a performance-oriented alternative to an original 1990s catalytic converter.
• Restores catalytic-converter functionality on vehicles where the original catalyst has previously been removed.
• Uses a high-flow 200-cell HJS catalyst rather than a conventional dense factory-style catalyst.
• Uses stainless-steel construction for corrosion resistance and durability.
• Retains catalytic treatment while offering flow characteristics closer to a less restrictive exhaust system.

Fabspeed states that its HJS high-flow catalysts can flow at more than 90% of the rate of a straight pipe in applicable installations while still providing catalytic exhaust-gas treatment.

Symptoms Of Wear Or Failure:
An original catalytic converter can deteriorate internally after decades of heat cycles, vibration and exposure to exhaust gases.

Possible symptoms include:

• Noticeable loss of engine power.
• Poor throttle response.
• Sluggish turbo response.
• Engine feeling restricted at higher RPM.
• Difficulty achieving full boost or performance.
• Excessive exhaust backpressure.
• Increased exhaust temperatures.
• Rattling noises from inside the catalytic converter.
• Metallic noises caused by a loose or broken catalyst core.
• Strong or unusual exhaust smells.
• Failed emissions testing.
• Increased exhaust emissions.
• Catalyst housing becoming excessively hot.
• Reduced fuel economy.
• Engine running poorly under load.
• Visible corrosion or damage to the original converter.
• Exhaust leaks around the converter or flanges.

A partially blocked catalyst may allow the engine to run reasonably well at low speed but restrict exhaust flow increasingly as engine speed and load rise.

Why Replacement Matters:
The catalytic converter sits directly in the exhaust path, so its internal condition has a major influence on both emissions performance and exhaust flow.

As the catalyst ages, the internal substrate can deteriorate, melt, become contaminated or break apart. A damaged catalyst may become increasingly restrictive, creating excessive exhaust backpressure.

On a turbocharged engine, restriction after the turbocharger is particularly undesirable because the turbocharger must push exhaust gases through the converter.

Replacing a worn or restrictive converter can help restore:

• Proper exhaust flow.
• Turbocharger response.
• Throttle response.
• Engine performance.
• Exhaust-gas treatment.
• Correct operating temperatures.
• Reliable exhaust-system operation.

NOTE: In the United Kingdom, sports catalytic converters and bypass pipes do not have type approval and are not legally permitted for use on vehicles manufactured after 1st March 2001. They are not MOT compliant and cannot be used on public roads. These components are intended solely for race and track use.

For vehicles manufactured before 1st March 2001, a non-type approved sports catalytic converter may be fitted, provided it offers comparable performance to the original and the vehicle continues to meet the applicable emissions standards for its age. The vehicle must still pass an MOT test.

If you are located outside the UK, please check your local laws and regulations to ensure compliance.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

FSPOR964TSC

The product you are viewing cross references to these numbers

Fabspeed Valved Center Muffler Bypass X-Pipe.

The Fabspeed Porsche 991.2 Carrera Valved Center Muffler Bypass X-Pipe is a performance exhaust upgrade developed specifically for 2017–2019 Porsche 991.2 Carrera 3.0L twin-turbo models originally equipped without Porsche Sport Exhaust (PSE).

Fits:

• Porsche 991.2 Carrera 2 3.0L (370 Bhp) 2016-19
• Porsche 991.2 Carrera 4 3.0L (370 Bhp) 2016-19
• Porsche 991.2 Cabriolet 2 3.0L (370 Bhp) 2016-19
• Porsche 991.2 Cabriolet 4 3.0L (370 Bhp) 2016-19
• Porsche 991.2 Targa 4 3.0L (370 Bhp) 2016-19  

The system replaces the large factory centre muffler section with a freer-flowing valved X-pipe arrangement, giving non-PSE cars the ability to switch between a more restrained exhaust character and a significantly more aggressive sports-car sound.

Manufactured from polished T304L stainless steel, the system uses premium UK-manufactured Helical vacuum-actuated exhaust valves and includes Fabspeed Deluxe Dual Style exhaust tips in a choice of finishes.

Fabspeed currently publishes:

• +17 horsepower
• +23 lb-ft torque
• 10 lb / 4.5 kg weight reduction

For a mechanically healthy vehicle, this product is primarily a sound, performance and weight-reduction upgrade, rather than a maintenance replacement.

What This Product Does:
The factory centre muffler reduces exhaust noise and provides the refinement expected from a standard road car.

The Fabspeed Valved Center Muffler Bypass replaces this restrictive centre section with a freer-flowing X-pipe and controllable exhaust valves.

The system is designed to:

• Increase exhaust flow
• Reduce centre-muffler restriction
• Increase exhaust sound
• Provide two different exhaust sound levels
• Increase horsepower and torque
• Reduce exhaust-system weight
• Enhance turbocharged flat-six character
• Retain the factory catalytic converters
• Maintain a direct bolt-on layout
• Upgrade the visible exhaust outlets with Deluxe Dual Style tips

Symptoms Of Wear Or Failure:
The factory muffler is exposed to substantial heat, moisture, vibration and repeated temperature changes.

Possible symptoms of deterioration include:

• Metallic rattling
• Internal muffler buzzing
• Exhaust blowing
• Hissing noises
• Cracked welds
• Corrosion
• Loose mounting brackets
• Black soot around leaking joints
• Exhaust vibration
• Muffler movement
• Exhaust tips sitting out of alignment
• Unexpected increase in exhaust noise

A metallic noise should be diagnosed carefully because heat shields, clamps or neighbouring exhaust components can cause similar symptoms.

Why Replacement Matters:
If the original centre muffler is physically damaged or leaking, replacement helps restore:

• A sealed exhaust path
• Correct exhaust alignment
• Secure mounting
• Controlled exhaust noise
• Proper clearance from surrounding components

Exhaust leaks can allow hot gases to escape close to heat-sensitive components and can create excessive noise or soot deposits.

However, if the original muffler is still healthy, installing the Fabspeed system is primarily an upgrade for sound, performance, valve control and weight reduction.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

FSPOR9912VLV

The product you are viewing cross references to these numbers

Fabspeed RENNKRAFT Modular Headers With HJS Catalytic Converters.

The Fabspeed Porsche 991 Carrera RENNKRAFT Modular Headers with HJS Catalytic Converters are a high-performance exhaust manifold and sport-catalyst upgrade developed for Porsche 991 Carrera models from 2012–2016.

Fits:

• Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
• Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16  

Fabspeed’s patented RENNKRAFT® modular design combines performance headers with removable catalyst sections connected by quick-release V-band clamps. In the road-oriented configuration, the system uses German HJS HD tri-metallic 200-cell catalytic converters to provide high exhaust flow while retaining catalytic exhaust treatment.

The headers are manufactured from CNC mandrel-bent T304L stainless steel and incorporate F1-style high-velocity merge collectors intended to improve exhaust scavenging. Fabspeed states that the system was developed from 3D scans of the original Porsche headers to achieve accurate bolt-on fitment.

For a mechanically healthy Porsche, this system is primarily a performance, exhaust-flow and sound upgrade rather than a maintenance replacement.

What This Product Does:

• The exhaust headers collect gases leaving each cylinder and route them toward the catalytic converters and the rest of the exhaust system.
• The factory headers must balance manufacturing cost, packaging, emissions performance, noise control and exhaust flow. The Fabspeed RENNKRAFT system is designed to provide a less restrictive route while improving the way exhaust pulses merge.
• Fabspeed states that the system provides +25 horsepower and +20 lb-ft of torque. These are Fabspeed-published figures from its testing and actual gains may vary according to vehicle condition, fuel, ambient conditions and the remainder of the exhaust system.
• The header system is designed to improve exhaust flow, enhance scavenging, produce a more aggressive exhaust note and create a modular platform that allows catalyst sections to be serviced or changed independently.

Symptoms Of Wear Or Failure:

• Factory exhaust headers are exposed to extremely high temperatures and repeated heating and cooling cycles.
• Possible signs of deterioration include exhaust ticking when cold, blowing or hissing noises, visible cracks, damaged welds, loose flange hardware, black soot around leaking joints, unusual exhaust smells, metallic rattling, increased engine-bay exhaust noise or reduced performance caused by leakage or restriction.
• Leaks often become more noticeable during cold start because gaps can change as the exhaust system reaches operating temperature.
• Catalytic converters can deteriorate through mileage, excessive heat, contamination or underlying engine problems.
• Potential symptoms include a Check Engine Light, catalyst-efficiency fault codes, reduced high-RPM performance, sluggish acceleration, excessive exhaust heat, metallic rattling from inside the catalyst, unusual exhaust smells or a feeling that the engine is unable to breathe freely at higher loads.
• A physically damaged catalyst substrate can break apart or melt, potentially creating exhaust restriction.

Why Replacement Matters:

• A leaking or cracked exhaust header can allow hot exhaust gases to escape before they reach the remainder of the exhaust system.
• This can lead to increased noise, inaccurate oxygen-sensor readings, reduced engine performance and unnecessary heat around nearby components.
• A blocked or damaged catalytic converter can create excessive exhaust restriction. On a naturally aspirated engine such as the 991.1 Carrera, restriction can reduce the engine’s ability to evacuate exhaust gases efficiently and may result in reduced power, poor high-RPM response and increased exhaust temperatures.
• Replacing worn or failed components restores a sealed and properly flowing exhaust path.
• If the original components are still healthy, however, fitting the Fabspeed RENNKRAFT system is mainly a performance and sound upgrade.

NOTE: In the United Kingdom, sports catalytic converters and bypass pipes do not have type approval and are not legally permitted for use on vehicles manufactured after 1st March 2001. They are not MOT compliant and cannot be used on public roads. These components are intended solely for race and track use.

For vehicles manufactured before 1st March 2001, a non-type approved sports catalytic converter may be fitted, provided it offers comparable performance to the original and the vehicle continues to meet the applicable emissions standards for its age. The vehicle must still pass an MOT test.

If you are located outside the UK, please check your local laws and regulations to ensure compliance.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

FSPOR991MHSC

The product you are viewing cross references to these numbers

Fabspeed Deluxe Quad-Style Tips.

The Fabspeed Porsche 996 Carrera 4S Deluxe Quad-Style Tips are premium replacement exhaust outlets designed to give the Porsche 996 Carrera 4S a more distinctive quad-exit appearance.

Fits:

• Porsche 996 C4S 3.6L 1999-2004

Manufactured from stainless steel, the tips replace the standard exhaust outlets while retaining the existing muffler system. They are intended for non-Porsche Sport Exhaust (non-PSE) vehicles and can be fitted to compatible factory mufflers or Fabspeed exhaust systems.

Available in Polished Stainless or Satin Black, the Deluxe Quad-Style Tips provide a more aggressive and contemporary rear-end appearance without requiring modification to the bumper or exhaust system.

What This Product Does:
Exhaust tips form the visible final section of the exhaust system.

Their primary functions include:

• Directing exhaust gases away from the rear bumper
• Providing a finished outlet for the exhaust system
• Maintaining correct exhaust outlet positioning
• Protecting the end of the muffler outlet connection
• Enhancing the appearance of the rear of the vehicle
• Allowing the exhaust outlets to be aligned correctly with the bumper openings

The Fabspeed Deluxe Quad-Style Tips replace the standard outlets with a four-outlet appearance, creating a more performance-oriented look.

This product is primarily a styling and exhaust-finishing upgrade. Fabspeed does not publish a horsepower or torque gain specifically for these tips.

Symptoms Of Wear Or Failure:
Exhaust tips are relatively simple components, but they are exposed continuously to heat, moisture, vibration and road contamination.

Common signs of deterioration include:

• Heavy surface corrosion
• Pitting
• Permanent staining
• Excessive carbon deposits
• Heat discolouration
• Peeling or damaged finish
• Dents
• Scratches
• Cracked welds
• Loose mounting connections
• Rattling
• Tips sitting unevenly
• Exhaust outlets contacting the bumper
• Cracks around the inlet or mounting area
• Excessive movement
• Black soot around a leaking connection

Cosmetic deterioration does not always mean the tip is structurally defective, but severe corrosion or damaged mounting points can justify replacement.

Why Replacement Matters:
Replacing damaged exhaust tips helps restore:

• Correct exhaust outlet positioning
• Secure mounting
• Clearance from the rear bumper
• A clean exhaust gas exit path
• Original or upgraded appearance
• Proper alignment between the left and right sides

If a tip becomes severely loose, cracked or corroded, replacement also reduces the risk of the component becoming detached.

Where the original tips remain mechanically sound, fitting the Fabspeed Deluxe Quad-Style Tips is primarily a visual upgrade rather than a repair requirement.

Related reference numbers
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FSPOR996QDT4

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Fabspeed Sport Cat.

The Fabspeed Porsche 992.2 Carrera GTS Sport Cat is a high-flow catalytic-converter upgrade developed specifically for the 2025+ Porsche 992.2 Carrera GTS T-Hybrid.

Fits:

• Porsche 992.2 Carrera 2 GTS 3.6L 2024>>
• Porsche 992.2 Carrera 4 GTS 3.6L 2024>>  

Designed as a direct bolt-on replacement for the restrictive factory catalyst arrangement, the Fabspeed Sport Cat improves exhaust-gas flow while retaining catalytic exhaust treatment.

The system is engineered to increase performance, reduce weight and produce a stronger, more motorsport-inspired flat-six exhaust note without converting the vehicle to an uncatalysed exhaust setup.

Fabspeed currently publishes:

• +50 horsepower
• +40 lb-ft torque
• 12 lb weight reduction

For a mechanically healthy vehicle, this product is primarily a performance, sound and weight-reduction upgrade rather than a routine maintenance replacement.

What This Product Does:
The catalytic converter sits in the exhaust stream and treats harmful exhaust gases before they leave the vehicle.

A factory catalyst must balance:

• Emissions control
• Noise requirements
• Durability
• Packaging
• Exhaust flow

The Fabspeed Sport Cat is designed to retain catalytic exhaust treatment while allowing gases to move more freely through the exhaust system.

Its intended benefits include:

• Increased exhaust flow
• Reduced exhaust restriction
• Increased horsepower
• Increased torque
• Reduced exhaust-system weight
• More aggressive exhaust sound
• Improved performance character
• Retained catalytic exhaust treatment
• Direct bolt-on fitment

Symptoms Of Wear Or Failure:
Catalytic converters operate at extremely high temperatures and can deteriorate through age, contamination, impact or engine-related problems.

Possible symptoms include:

• Check Engine Light
• Catalyst-efficiency fault codes
• Reduced engine performance
• Poor high-RPM response
• Increased exhaust restriction
• Internal rattling
• Metallic noises from the catalyst
• Unusually high exhaust temperatures
• Sulphur-like exhaust smell
• Poor throttle response
• Exhaust flow feeling restricted
• Discolouration caused by excessive heat
• Cracks in the catalyst housing or welds
• Exhaust leakage around joints or flanges

A diagnostic inspection should be carried out before replacing a catalyst because oxygen-sensor, ignition, fuelling or engine-management faults can produce similar symptoms.

Why Replacement Matters:
A genuinely failed or restricted catalytic converter can affect:

• Engine performance
• Exhaust flow
• Exhaust temperatures
• Emissions performance
• Turbocharger operating conditions
• Engine-management operation

A severely damaged catalyst can create enough restriction to interfere with normal engine breathing.

Replacing a failed catalyst restores a clear exhaust path and proper catalytic treatment.

Where the factory catalyst is healthy, however, fitting the Fabspeed Sport Cat is primarily a performance upgrade rather than a necessary repair.

NOTE: In the United Kingdom, sports catalytic converters and bypass pipes do not have type approval and are not legally permitted for use on vehicles manufactured after 1st March 2001. They are not MOT compliant and cannot be used on public roads. These components are intended solely for race and track use.

For vehicles manufactured before 1st March 2001, a non-type approved sports catalytic converter may be fitted, provided it offers comparable performance to the original and the vehicle continues to meet the applicable emissions standards for its age. The vehicle must still pass an MOT test.

If you are located outside the UK, please check your local laws and regulations to ensure compliance.

 

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FSPOR9922GTSSC

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Fabspeed Race System.

The Fabspeed Porsche 992.2 Carrera GTS Race System is a complete high-performance turbocharger-back exhaust system developed specifically for the Porsche 992.2 Carrera GTS T-Hybrid.

Fits:

• Porsche 992.2 Carrera 2 GTS 3.6L 2024>>
• Porsche 992.2 Carrera 4 GTS 3.6L 2024>>  

Unlike a simple rear muffler upgrade, this system replaces a substantial portion of the factory exhaust arrangement, including the bulky OEM catalytic-converter assembly and the heavy left-rear valved side muffler.

The system incorporates a German HJS Emitec 200-cell high-flow catalytic converter and twin T-Hybrid exhaust outlets, providing a freer-flowing exhaust path while retaining catalytic exhaust treatment.

Fabspeed currently publishes:

• +60 horsepower
• +45 lb-ft torque
• 36 lb / 16 kg weight reduction

The system is engineered as a complete bolt-on package and is designed to provide a significantly more aggressive sports-car exhaust note while reducing weight and heat at the rear of the vehicle.

What This Product Does:
The factory exhaust system must balance emissions control, refinement, noise reduction, packaging and performance.

The Fabspeed Race System changes the exhaust path from the turbocharger rearward to reduce restriction and remove substantial weight from the rear of the car.

The system is designed to:

• Increase exhaust flow
• Reduce exhaust restriction
• Increase horsepower
• Increase torque
• Reduce rear vehicle weight
• Produce a more aggressive flat-six exhaust note
• Replace the heavy factory catalytic-converter assembly
• Eliminate the heavy left-rear valved side muffler
• Reduce heat retention in the rear bumper area
• Retain catalytic exhaust treatment
• Maintain a complete bolt-on installation
• Provide a reversible alternative to the factory exhaust system

For a mechanically healthy standard car, this system is primarily a performance, sound, heat-management and weight-reduction upgrade rather than a maintenance replacement.

Symptoms Of Wear Or Failure:
The factory exhaust system must balance emissions control, refinement, noise reduction, packaging and performance.

The Fabspeed Race System changes the exhaust path from the turbocharger rearward to reduce restriction and remove substantial weight from the rear of the car.

The system is designed to:

• Increase exhaust flow
• Reduce exhaust restriction
• Increase horsepower
• Increase torque
• Reduce rear vehicle weight
• Produce a more aggressive flat-six exhaust note
• Replace the heavy factory catalytic-converter assembly
• Eliminate the heavy left-rear valved side muffler
• Reduce heat retention in the rear bumper area
• Retain catalytic exhaust treatment
• Maintain a complete bolt-on installation
• Provide a reversible alternative to the factory exhaust system

For a mechanically healthy standard car, this system is primarily a performance, sound, heat-management and weight-reduction upgrade rather than a maintenance replacement.

Why Replacement Matters:
A damaged exhaust component can affect performance, noise, heat management and reliability.

Continued operation with a failing catalyst, muffler or exhaust joint may contribute to:

• Reduced power
• Increased exhaust restriction
• Excessive heat
• Exhaust leakage
• Increased stress on neighbouring components
• Catalyst-related warning lights
• Poor exhaust alignment
• Unwanted vibration and rattling

Replacing defective components restores a secure and properly flowing exhaust path.

If the original exhaust is healthy, however, the Fabspeed Race System should be considered an upgrade rather than a required repair.

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FSPOR9922GTSSCSMD

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Fabspeed Side Muffler Bypass.

The Fabspeed Porsche 992.2 Carrera GTS Side Muffler Bypass is a lightweight, high-flow exhaust upgrade developed specifically for the Porsche 992.2 Carrera GTS T-Hybrid.

Fits:

• Porsche 992.1 Carrera GTS 3.0L 2019-24
• Porsche 992.1 Carrera GTS 3.0L 2019-24
• Porsche 992.1 Carrera GTS Cabriolet 3.0L 2019-24
• Porsche 992.1 Carrera GTS Cabriolet 3.0L 2019-24  

Designed as a direct replacement for the large factory left-side muffler, the system uses a 3-inch / 76 mm exhaust pipe to create a more direct exhaust route.

The result is a significantly more aggressive flat-six exhaust note, reduced rear weight and improved exhaust flow without replacing the vehicle's factory catalytic-converter system.

Fabspeed manufactures the system in the USA using its in-house 3D scanning, CAD design and CNC mandrel-bending processes.

What This Product Does:
The factory side muffler is designed to reduce exhaust noise and provide the refinement expected from a modern Porsche.

While effective for sound suppression, the muffler also adds weight and creates additional exhaust restriction.

The Fabspeed Side Muffler Bypass replaces this component with a much simpler, freer-flowing pipe.

The system is designed to:

• Reduce exhaust restriction
• Increase exhaust volume
• Produce a more aggressive flat-six sound
• Improve exhaust flow
• Reduce rear vehicle weight
• Reduce heat associated with the large factory muffler
• Increase horsepower and torque
• Retain the original catalytic converters
• Maintain a bolt-on installation

For a healthy factory vehicle, this product should primarily be considered a performance, sound and weight-reduction upgrade, rather than a maintenance replacement.

Symptoms Of Wear Or Failure:
The factory muffler does not normally require replacement solely because of mileage, but exhaust components can deteriorate through heat, condensation, vibration and impact.

Possible symptoms include:

• Metallic rattling from inside the muffler
• Buzzing at particular engine speeds
• Exhaust blowing or hissing
• Cracks around welds or joints
• Loose exhaust connections
• Corrosion
• Damaged muffler casing
• Exhaust mounting problems
• Excessive exhaust movement
• Black soot around leaking joints
• Unusual vibration
• Exhaust system sitting out of alignment
• Increased noise caused by internal muffler failure

These symptoms may also originate from heat shields, clamps, exhaust valves or adjoining components, so proper inspection is recommended.

Why Replacement Matters:
A damaged factory muffler can cause more than unwanted noise.

Continued use with a deteriorated exhaust component may contribute to:

• Exhaust leakage
• Excessive vibration
• Increased stress on neighbouring exhaust components
• Hot gases escaping near surrounding parts
• Poor exhaust alignment
• Reduced exhaust flow

Replacing a failed component restores a secure exhaust route.

However, when the factory muffler remains fully serviceable, fitting the Fabspeed Side Muffler Bypass is primarily an upgrade for increased sound, improved flow, reduced weight and additional performance.

NOTE: In the United Kingdom, sports catalytic converters and bypass pipes do not have type approval and are not legally permitted for use on vehicles manufactured after 1st March 2001. They are not MOT compliant and cannot be used on public roads. These components are intended solely for race and track use.

For vehicles manufactured before 1st March 2001, a non-type approved sports catalytic converter may be fitted, provided it offers comparable performance to the original and the vehicle continues to meet the applicable emissions standards for its age. The vehicle must still pass an MOT test.

If you are located outside the UK, please check your local laws and regulations to ensure compliance.

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FSPOR9922GTSSMB

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Fabspeed Cat-Back Valved Maxflo Exhaust System.

The Fabspeed Cat-Back Valved Maxflo Exhaust System is a premium performance exhaust upgrade developed for the 2025+ Porsche 992.2 Carrera with the 3.0-litre twin-turbo flat-six engine.

Fits:

• Porsche 992.2 Carrera 2 3.0L 2024>>
• Porsche 992.2 Carrera 2S 3.0L 2024>>  

Designed as a replacement for the factory cat-back exhaust section, the system provides a more aggressive Porsche exhaust note while retaining the vehicle's factory-style valved exhaust functionality.

Fabspeed manufactures the system from 14–16 gauge CNC mandrel-bent T304L stainless steel and uses premium Helical Limited exhaust valves manufactured in the UK.

Fabspeed specifies the system for 992.2 Carrera 3.0L models and specifically states that it does not fit the 3.6L hybrid system used by models such as the 992.2 GTS.

What This Product Does:
The cat-back exhaust controls exhaust flow, sound attenuation and outlet routing downstream of the catalytic converters.

The Fabspeed Valved Maxflo system is designed to:

• Increase exhaust sound and character
• Provide a deeper twin-turbo flat-six exhaust note
• Retain Porsche Sport Exhaust valve operation
• Allow quieter and louder exhaust modes
• Reduce restriction through the rear exhaust section
• Increase turbocharger and exhaust sound
• Maintain factory-style fitment
• Work with the original Porsche catalytic converters
• Work with compatible Fabspeed Sport Catalytic Converters
• Retain the appropriate OEM-style exhaust tip arrangement

For a mechanically healthy vehicle, this system is primarily a sound, performance-character and exhaust-flow upgrade, rather than a wear-related maintenance replacement.

Symptoms Of Wear Or Failure:
Factory exhaust components are exposed to considerable heat, condensation, vibration and repeated thermal cycling.

Possible symptoms of deterioration include:

• Exhaust rattling
• Metallic buzzing
• Valve rattling
• Exhaust valves sticking
• Exhaust valves failing to open or close correctly
• Blowing or hissing noises
• Black soot around leaking joints
• Cracked welds
• Loose clamps
• Damaged exhaust hangers
• Corrosion
• Internal muffler rattling
• Exhaust tips sitting out of alignment
• Increased vibration
• Unwanted exhaust drone
• Exhaust gases escaping from damaged joints

A rattle should be diagnosed carefully because heat shields, mounting brackets or internal muffler components can produce similar symptoms.

Why Replacement Matters:
A damaged exhaust system can affect more than sound.

Leaks, broken mounts or failed valves can lead to:

• Excessive exhaust noise
• Unwanted rattling
• Poor exhaust alignment
• Increased stress on adjoining components
• Hot exhaust gases escaping near surrounding parts
• Loss of proper valve operation
• Damage to bumper or diffuser areas if the exhaust moves excessively
• Replacing a damaged system restores secure exhaust routing and correct operation.

Where the factory exhaust remains healthy, installing the Fabspeed system is primarily an upgrade for sound, exhaust character and freer-flowing construction.

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FSPOR9922VLV

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Fabspeed Deluxe Quad Style Tips.

The Fabspeed Deluxe Quad Style Tips are a premium exhaust-finishing and styling upgrade designed for the 2015–2018 Porsche 958.2 Cayenne Turbo and Turbo S.

Fits:

• Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2015-18
• Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2015-18 

They replace the original exhaust outlets with a more aggressive quad-tip design, allowing the appearance of the rear of the Cayenne to be upgraded without replacing the complete exhaust system.

Fabspeed currently offers the tips in several finish options:

• Polished Stainless Steel
• Carbon Fiber
• Satin Black
• Titanium

The tips are designed specifically for vehicles equipped with:
Factory Porsche Sport Exhaust (PSE), or
Fabspeed Valvetronic Exhaust

They are not compatible with the standard non-PSE factory exhaust system.

What This Product Does:
Exhaust tips form the final visible outlets of the exhaust system.

Their primary functions are to:

• Direct exhaust gases away from the rear of the vehicle
• Provide a finished appearance to the exhaust outlets
• Replace damaged or deteriorated original tips
• Create a sportier quad-tip appearance
• Maintain correct exhaust outlet positioning
• Allow the rear appearance of the vehicle to be customised
• Fit compatible Porsche PSE and Fabspeed Valvetronic systems

These tips are primarily a styling and exhaust-finishing upgrade rather than a significant engine-performance modification.

Symptoms Of Wear Or Failure:
Exhaust tips are exposed continuously to heat, moisture, exhaust soot, road contamination and vibration.

Common signs of wear or damage include:

• Heavy scratching or scuffing
• Surface corrosion
• Pitting
• Permanent heat staining
• Excessive discoloration
• Dents from impact
• Distorted exhaust outlets
• Cracked mounting areas
• Loose mounting hardware
• Rattling while driving
• Excessive tip movement
• Poor alignment within the rear bumper
• One tip sitting lower or further outward than another
• Damaged carbon-fibre outer sections
• Peeling or deteriorated coatings
• Excessive soot accumulation
• Contact between the exhaust tip and surrounding trim

Some heat staining and soot accumulation are normal on performance exhaust systems and do not necessarily indicate structural failure.

Why Replacement Matters:
If the original exhaust tips are only scratched or discoloured, replacement is mainly cosmetic.

However, physically damaged or loose tips can create additional problems.

A damaged exhaust tip may:

• Rattle during driving
• Move out of alignment
• Contact the bumper or rear valance
• Mark or damage surrounding trim
• Vibrate against adjacent components
• Become progressively looser
• Eventually detach if the mounting system fails

Replacing damaged tips restores secure exhaust outlet positioning and a clean finished appearance.

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FSPOR9582TQDT

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