Fabspeed Sport Catalytic Converters With GT2RS Style Outlets + Muffler Adapter. Porsche 992 Twin Turbo / Twin Turbo S (2021+)  ›  FSPOR992TSCGT2WC

The Fabspeed Sport Catalytic Converters with GT2RS Style Outlets + Muffler Adapter are a high-performance exhaust upgrade designed for the Porsche 911 992 Turbo and Turbo S from 2021 onward.

Fits:

• Porsche 992.1 Turbo 3.8L 2021-24
• Porsche 992.1 Turbo S 3.8L 2021-24
• Porsche 992.1 Turbo Cabriolet 3.8L 2021-24
• Porsche 992.1 Turbo S Cabriolet 3.8L 2021-24  

By reducing exhaust restriction downstream of the turbochargers, the system allows exhaust gases to leave the engine more efficiently. This can improve turbocharger response, increase power and torque, reduce exhaust-system weight and produce a substantially more aggressive exhaust note.

Fabspeed's design replaces the original approximately 800-cell catalytic converters with significantly freer-flowing HJS catalysts while retaining catalytic exhaust treatment.

The GT2RS-style outlets create a direct, low-restriction route from the sport catalysts towards the exhaust tips, effectively providing the most free-flowing configuration available within this Fabspeed system while retaining catalytic converters.

Fabspeed reports dyno gains of up to 47.7 WHP and 47.1 lb-ft of torque, with approximately 54 HP claimed at the crank on its test vehicle. Actual results vary according to vehicle condition, fuel, environmental conditions and accompanying modifications.

What This Product Does:
The catalytic converter sits downstream of the turbocharger and performs two important functions:

• It treats exhaust gases before they leave the vehicle.
• It forms part of the exhaust path through which the turbocharger must discharge exhaust flow.

The Fabspeed system is designed to:

• Reduce restriction after the turbochargers.
• Increase exhaust gas flow.
• Reduce backpressure.
• Improve turbocharger response.
• Allow the VTG turbochargers to spool more quickly.
• Support increased horsepower and torque.
• Increase exhaust volume and character.
• Produce more noticeable turbocharger sound.
• Increase burbles and overrun sound.
• Reduce exhaust-system weight.
• Retain catalytic exhaust treatment.
• Replace the factory rear muffler arrangement with GT2RS-style direct outlets.

Possible symptoms include:

• Check Engine Light.
• Catalyst-efficiency fault codes.
• Loss of engine power.
• Slower turbo response.
• Increased exhaust backpressure.
• Reduced performance at higher RPM.
• Metallic rattling from inside the catalyst.
• Unusual exhaust smells.
• Excessively high catalyst temperatures.
• Internal catalyst material breaking apart.
• Melted or collapsed catalyst substrate.
• Engine feeling restricted under boost.
• Uneven exhaust flow.
• Failed emissions testing where applicable.

A failing catalyst should be diagnosed properly before replacement because engine-management, fueling or ignition faults may have caused the damage.

Why Replacement / Upgrading Matters:
Replacing restrictive or deteriorated catalysts with a high-flow sport catalyst system can help restore or improve:

• Exhaust gas flow.
• Turbocharger response.
• Power and torque.
• High-load performance.
• Exhaust sound.
• Exhaust-system weight.
• Catalyst reliability.
• Overall performance character.

The GT2RS-style outlet configuration also removes much of the restriction and weight associated with the standard rear muffler arrangement.