Why We Choose HJS Catalytic Converters:  HJS German imported catalytic converters are made from some of the highest grade materials you can find in a catalytic converter. This yields high performance...

These modular Shelby GT350/GT350R RENNKRAFT® Sport Catalytic Converters are the perfect solution for any street and track focused GT350/GT350R owner. Adding significant power and sound, you have the...

Replaces the restrictive 800-cell factory Ferrari cats with 200-cell high-performance sport cats for improved performance and sound or as a replacement for failing/broken factory cats FEATURES: Fits...

Replaces the restrictive factory catalytic converters with high-performance 200 cell HJS sport cats for maximum performance and sound. SOUND: These free flowing sport cats with will significantly...

Direct replacement bolt-on, precision crafted pipes to replace 4 small, extremely restrictive OEM Ceramic Catalytic Converters.  FEATURES: Direct replacement bolt-on, pr

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...

Replaces the four restrictive factory catalytic converters with two ultra high-performance HJS German-imported 200CPSI HE EURO 6 sport catalytic converters for improved performance and sound. These...

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

These patented modular Shelby GT500 RENNKRAFT® Sport Catalytic Converters are the perfect solution for any street and track focused GT500 owner. Adding significant power and sound, you have the...

Our Sport Catalytic Converters Replaces the four restrictive McLaren 720S OEM catalytic converters with two ultra high-performance 200 cell HJS German-Imported Tri-Metallic high flow catalytic...

Replaces the restrictive factory cats with high-performance, German made, HJS 200-cell sport cats for maximum performance and sound. SOUND: Give your Gallardo a moderate increase in volume and tone...

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...

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

Complete high-performance exhaust and tuning solution for the 2019+ Audi R8 V10; includes Valvetronic Supersport X-Pipe Exhaust System, BMC F1 Replacement Air Filters, and Fabspeed ECU Tuning...

Replacement 2-bolt flange for the wastegate on the Porsche 944 Turbo 951                                                                                    

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,...

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

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

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