Fabspeed RENNKRAFT Modular Headers 2015-16 Porsche 981 GT4/Spyder

Sale Price$4,506.95 USD
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These modular headers are the perfect solution for any Cayman or Boxster. A patented RENNKRAFT® modular design features a quick release V-band connector that allows the owner to easily swap between HJS 200 cell cats and cat bypass pipes.

RENNKRAFT®, translated from German is “race power”. These unique headers offer true street and racetrack functionality in an innovative precision engineered package. 


With the addition of 200 cell cats, the exhaust note becomes louder and gains a more raw, unfiltered sound. Higher frequency tones are more distinct and off throttle burbles are stronger and clearer.

Upon installation of the cat bypass pipes, the exhaust emits a sound reminiscent of a 911 CUP car rather than a typical Porsche street car. 

The volume isn't overbearing, but the sound is very aggressive and race bred. It totally changes the character of the car.


  • Fits all Porsche 981 Cayman GT4 / Boxster Spyder vehicles (2015-16)
  • CNC mandrel-bent T304L stainless steel
  • Impressive power and performance gains
  • Save 2lbs with sport cats and 7lbs with cat bypass compared to the factory headers
  • Modular design that uses a V-band clamp so you can quickly swap between cats and cat bypass
  • With the RENNKRAFT® system, you can quickly install cat bypass pipes for racing
  • The RENNKRAFT® system has been awarded a US Patent and is the only system of its kind in the world
  • Switching to cat-bypass for track events prevents catalytic converter degradation during all out competition racing abuse
  • F1 style high velocity merge collectors
  • Designed from 3D scans of the OEM headers so we can achieve perfect bolt-on fitment
  • German-made HJS HD tri-metallic 200-cell EURO 6 homologated catalytic converters for the best performance and reliability
  • The largest catalytic converters that fit in the factory location for maximum flow
  • Flows 93% of a 2.5 in straight pipe
  • Optimized for maximum performance with no check engine light when sport cats are installed
  • No ECU tune required
  • Will fit with any brand of aftermarket exhaust system designed to work with the factory headers
  • 25+ years of air and water-cooled Porsche experience went into this design of these hand-crafted headers
  • Bolt-on installation. No cutting or welding required


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