These modular RENNKRAFT® headers are the perfect solution for any street driven 4.0 liter Cayman or Boxster. Our patented modular design features a quick release V-band connector that allows the...

These modular headers are the perfect solution for any Porsche 911. Our United States patented RENNKRAFT® modular design features a quick release V-band connector that allows the owner to easily swap...

The Porsche Macan is Porsche's most popular model and boasts the highest volume of sales. The Macan is a true enthusiast car, and dramatically benefits from a Fabspeed Sport Cat. You'll appreciate...

Replaces the restrictive factory catalytic converters with two ultra high-performance HJS German-imported Sport Cats for improved performance and hypercar sound. Clean and Green Performance from...

These modular headers are the perfect solution for any Porsche 911. Our United States patented RENNKRAFT® modular design features a quick release V-band connector that allows the owner to easily swap...

Fabspeed Motorsport USA was the world's very first company to design, engineer, and dyno develop McLaren systems. Replaces the four restrictive factory OEM catalytic converters with two ultra...

Replace the restrictive factory catalytic converters with high-performance 200-cell HJS Sport Cats for maximum performance and sound. SOUND: These Sport Cats will give your F355 a mild but...

Fabspeed Motorsport USA was the world's very first company to design, engineer, and dyno develop McLaren systems. We replace the four restrictive factory OEM catalytic converters with two ultra...

Product Features & Benefits Direct bolt-on replacement for the factory left and right side mufflers on all Porsche 992.2 911 Turbo and Turbo S models worldwide. Engineered as a precision...

Replaces the restrictive factory cats with high-performance HJS Racing sport cats for maximum performance and sound. SOUND: Dramatically improve the sound of your GranTourismo by ditching the sound...

These modular headers are the perfect solution for any Cayman or Boxster. Our patented RENNKRAFT® modular design features a quick release V-band connector that allows the owner to easily swap between...

Replaces the restrictive factory cats with high-performance HJS sport catalytic converters for maximum performance and sound. SOUND: Give your Murcielago a significant bump in volume and high...

These Fabspeed US PATENTED # modular headers are the perfect solution for any Cayman or Boxster. Our United States patented RENNKRAFT® modular design features a quick release V-band connector that...

Replaces the restrictive factory cats or illegal catbypass pipes with the world's largest high-performance German-imported 200-cell HJS sport catalytic converters for significantly improved...

Our HJS GERMAN Sport Catalytic Converters replaces the restrictive McLaren 765LT OEM catalytic converters with two ultra high-performance 200 cell HJS German-Imported Tri-Metallic high flow catalytic...

HJS German-imported 200-cell HJS HD Sport Cats increase exhaust flow for better power and throttle response and improved sports car sound.                                                   FEATURES:

Our HJS GERMAN Sport Catalytic Converters replaces the restrictive McLaren 750S OEM catalytic converters with two ultra high-performance 200 cell HJS German-Imported Tri-Metallic high flow catalytic...

  HJS Emitec GERMAN Super high-performance ULTRA High-flowing, direct bolt-on replacement for the bulky & restrictive factory catalytic 700 cell converters.                                           ...

High-flowing catalytic converters that drastically increase exhaust flow compared to the factory bulky and restrictive catalytic converters. SOUND: Expect a mild increase in exhaust volume and a...

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...