Fabspeed Porsche 718 GT4 / GTS / Spyder RENNKRAFT™ Modular Street and Racing Headers with HJS Catalytic Converters (2020+)

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 owner to easily swap between our German made HJS 200 cell cats and a cat bypass “straight pipes” for track use (patent pending). Rennkraft® , translated from German is “race power”. These unique headers offer true street and racetrack functionality in an innovative precision engineered package.  SOUND: Many have complained about the lack of sound with the new 718 4.0 Liter cars, these high flowing headers completely solve that issue. Equipped with our 200 cell cats, you will get a louder exhaust note with a much more raw sound. Higher frequency tones are more defined, and deceleration burbles are more robust and transparent. With the cat bypass pipes installed, you're in store for a sound much more akin to a 911 CUP car than a 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. With the stock muffler in place, there is no drone what-so-ever, even with our Over Axle GPF Delete Pipes also installed. POWER: After extensive dyno development we found that mid length headers made the most power across the entire power band. With no tune, compared to a stock car we gained 31 whp and 19 ft/lbs of TQ at 7400 RPM with Sport Cats and 33 whp and 24 ft/lbs of TQ at 7200 RPM with Cat Bypass Pipes installed. That's a gain of 33 HP and 36 HP, respectively, at the crank! Peak horsepower also increased from our baseline of 383 whp to 405 whp with our HJS Sport Cats and 409 whp with Cat Bypass Pipes. See our dyno graph above for more details. FEATURES: Fits all Porsche 4.0L Cayman/Boxster GT4/GTS/Spyder vehicles 2020+Impressive dyno proven power gains of 31 whp and 19 ft/lbs of TQ with the Sport Cats and 33 whp and 24 ft/lbs of TQ with Cat Bypass installedSave 2 lbs / 0.9 KGs with Sport Cats and 7 lbs / 3.2 KGs with Cat Bypass compared to the factory headersModular design that uses a V-band clamp so one can quickly swap between cats and cat bypassWith the RENNKRAFT® system, you can quickly install our QUICKTRACK™ cat bypass pipes for Racing and all out Race track-only competition eventsThe RENNKRAFT® system has been awarded a US Patent and is the only system of its kind in the worldSwitching to cat-bypass for track events prevents catalytic converter degradation during all out competition racing abuseF1 style high velocity merge collectorsDesigned from 3D scans of the OEM headers so we can achieve perfect bolt-on fitmentWe use German-made HJS HD tri-metallic 200-cell EURO 6 homologated catalytic converters for the best performance and reliabilityWe use the largest catalytic converters that will fit in the factory location for maximum flowFlows 93% of a 2.5 in straight pipeOptimized for maximum performance with NO catalyst generated check engine light, guaranteed, when Sport Cats are installedNo ECU tune requiredNOT EPA or CARB Certified and not be used on street driven vehiclesWill fit with any brand of aftermarket exhaust system designed to work with the factory headersBuilt 100% in house at Fabspeed Motorsport USA in Fort Washington, PAThese are the very finest headers for the 718 4.0 liter cars and where developed in collaboration with HJS Emissions Technology25+ years of air-cooled and water-cooled Porsche experience went into our design for these hand-crafted headersConstructed from CNC mandrel-bent T304L stainless steelSimple DIY (Do-It-Yourself) bolt-on installation, no cutting or welding requiredAll Fabspeed performance products are backed by the Fabspeed Lifetime Warranty