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Catalyst / Bypass
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
- Porsche 992.1 Carrera 2 3.0L 2019-24
- Porsche 992.1 Carrera 4 3.0L 2019-24
- Porsche 992.1 Carrera 2 Cabriolet 3.0L 2019-24
- Porsche 992.1 Carrera 4 Cabriolet 3.0L 2019-24
- Porsche 992.2 Carrera 2 3.0L 2024>>
Shop Securely
12 Month Warranty
Worldwide Delivery
Free delivery
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
- Porsche 992.1 Carrera 2 3.0L 2019-24
- Porsche 992.1 Carrera 4 3.0L 2019-24
- Porsche 992.1 Carrera 2 Cabriolet 3.0L 2019-24
- Porsche 992.1 Carrera 4 Cabriolet 3.0L 2019-24
- Porsche 992.2 Carrera 2 3.0L 2024>>
Shop Securely
12 Month Warranty
Worldwide Delivery
Free delivery
Exhaust Catalytic Converters & Bypass Pipes – Performance, Efficiency & Flow Control
The catalytic converter plays a crucial role in your Porsche’s exhaust system, reducing harmful emissions while maintaining optimal exhaust flow. Positioned between the exhaust manifold and silencer, it converts toxic gases such as carbon monoxide, hydrocarbons, and nitrogen oxides into less harmful emissions before they exit the tailpipe.
At Design911, we offer a complete range of catalytic converters and bypass pipes for Porsche vehicles. Our manufacturer-quality converters ensure reliable emission control and long-term performance, while our bypass options are designed for track or performance use, optimising exhaust flow for maximum power and throttle response.
Whether you’re maintaining your Porsche to meet emissions standards or upgrading for improved exhaust performance, our selection includes both direct-fit converters and performance bypass kits built from high-grade stainless steel for strength, corrosion resistance, and durability.
What Do Catalytic Converters & Bypass Pipes Do?
A catalytic converter uses a fine mesh of precious metals to trigger chemical reactions that break down pollutants. The bypass alternative eliminates restriction in the exhaust flow, improving performance in non-emissions-controlled environments such as track driving.
Core Functions:
- Converts
toxic exhaust gases into environmentally friendly emissions.
- Maintains
exhaust back pressure for engine efficiency.
- Reduces harmful NOx, CO, and HC emissions.
- Supports smoother engine performance and throttle control.
- Bypass versions enhance exhaust flow and improve power output for track cars.
Upgrading to a performance-grade system ensures your Porsche continues to meet emission requirements — or achieves greater flow and responsiveness for motorsport applications.
Why Do Catalytic Converters Fail?
Catalytic converters are exposed to extreme heat, unburnt fuel, and contaminants — all of which can degrade their performance over time.
Common Causes of Failure Include:
- Carbon
or oil buildup blocking the internal honeycomb.
- Thermal
damage from overheating or rich fuel mixtures.
- Physical
damage from road debris or misfiring engines.
- Corrosion
due to moisture and exhaust condensation.
- Age-related wear reducing catalytic efficiency.
A failing converter can cause reduced engine power, poor
fuel economy, rattling sounds, or a check-engine light. Replacing it
restores emissions compliance, performance, and exhaust efficiency.
Why Replace or Upgrade
with Precision-Engineered Components?
Replacing a failing converter or upgrading to a bypass pipe ensures your Porsche maintains peak performance and reliability.
Key Benefits:
- Restores optimal emissions performance and efficiency.
- Improves exhaust flow and throttle response.
- Reduces engine stress and fuel consumption.
- Durable stainless-steel construction for longevity.
- Direct-fit
compatibility for Porsche 911, Cayman, Boxster, Panamera, Macan
and more.
- Performance bypass options available for track and tuning applications.
Whether you want emissions compliance or maximum flow for competition use, our parts deliver reliability, precision, and performance.
Highlights:
- Direct-fit catalytic converters and bypass pipes for Porsche models.
- Precision-engineered for optimal flow and reduced emissions.
- Built from heat-resistant stainless steel for durability.
- Bypass pipes for performance tuning and track applications.
- Restores power, efficiency, and exhaust sound balance.
- Available for classic and modern Porsche vehicles.
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Saturday: Closed
Sunday: Closed