Genuine HJS Tuning catalytic converter cores for replacement/upgrade of restrictive factory cats.  This is an individual catalyst; welding required.                                          ...

FEATURES: Fits all McLaren P1 vehicles Improves power and throttle response while adding true hypercar-worthy exhaust sound Less restriction after the turbo allows for faster spooling and boost...

Genuine HJS Tuning catalytic converter cores for replacement/upgrade of restrictive factory cats.  This is an individual catalyst; welding required.                                        ...

Optimized design that replaces the heavy and all very restrictive GT3  factory side mufflers for improved exhaust flow, increased sound, radiant heat,  and massive weight savings. Available with or...

FEATURES: Fits the McLaren Senna Improves power and throttle response while adding true hypercar-worthy exhaust sound Less restriction after the turbo allows for faster spooling and boost...

German-imported 200-cell HJS Sport Cats increase exhaust flow for better power and throttle response and improved sports car sound. FEATURES: Fits all Porsche 997 GT2 vehicles (2008-2009) Less...

Fabspeed Audi SQ8 Sport Catalytic Converters replace the restrictive factory cats with high-performance German-imported 200-cell HJS catalytic converters for significantly improved performance and...

The C8 ZR1 is already a 1064HP beast—but stock restrictions choke it's true potential. FABSPEED MOTORSPORT USA's ULTRA High-Flow GERMAN Imported Racing Catalytic converters are 100% PROVEN in GLOBAL...

Eliminate the heavy and restrictive factory catalytic converters with straight-pipe, high flowing stainless steel downpipes for maximum power and an exhilarating sound.                               ...

Replaces the restrictive, failure prone factory catalytic converters with our high-performance HJS 200 Cell Tri-Metallic sport cats for maximum performance and sound. SOUND: Give your 348 a...

These CAD designed and USA Patented modular headers are the perfect solution for any Cayman or Boxster owner looking for maximum increased power and sports car sound. Our patented RENNKRAFT® modular...

High-performance bolt-on replacement for the heavy and restrictive OEM catalytic converter. Increase the power, sound, and throttle response of your 308. SOUND: Experience the way your 308 was meant...

These Fabspeed Motorsport modular headers are the perfect solution for any street driven 992 GT3/ GT3RS. Our US Patented RENNKRAFT® modular design features a quick release V-band connector that...

Replaces the restrictive factory cats with high-performance modern catalytic converters for maximum performance and increased sports car sound FEATURES: Fits all Porsche 986 Boxster / S vehicles...

Eliminate the heavy and restrictive factory catalytic converters with straight-pipe, high flowing stainless steel downpipes for maximum power and an exhilarating sound.                               ...

Eliminate the heavy and restrictive factory catalytic converters with straight-pipe, high flowing stainless steel downpipes for maximum power and an exhilarating sound.                               ...

PURCHASE DISCLAIMER: Fabspeed Motorsport does not condone the use of emission defeat devices for any vehicles used on public streets or roadways. Fabspeed Motorsport will not tamper, remove, disable,...

Fabspeed Audi RSQ8 Sport Catalytic Converters replace the restrictive factory cats with high-performance German-imported 200-cell HJS catalytic converters for significantly improved performance and...

Fabspeed Audi SQ7 Sport Catalytic Converters replace the restrictive factory cats with high-performance German-imported 200-cell HJS catalytic converters for significantly improved performance and...

These Shelby GT500 Sport Catalytic Converters are the perfect solution for any street and track focused GT500 owner. Adding significant power and sound, you have the option to go with ultra...