Fabspeed RENNKRAFT Modular Headers for 982 Porsche 718 Boxster GTS and 718 Cayman GT4 / GTS / Spyder



Fabspeed RENNKRAFT Modular Headers

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SKU: FS.POR.718GT4.XXX Category: Vehicle: Brand:
This item and any similar items are not CARB approved and therefore not for sale in the state of California or other states that require CARB certification. No assessment is being made regarding this product's compliance with the EPA's anti tampering policy, only that the necessary testing and validation has not been completed. Please check with your local enforcement officials regarding legality of use in your place of residence.
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Fabspeed RENNKRAFT Modular Headers for 982 Porsche 718 Boxster GTS and 718 Cayman GT4 / GTS / Spyder

The modular RENNKRAFT headers present an ideal solution for any street-driven 4.0-liter Cayman or Boxster. Featuring a patented modular design, these headers incorporate a quick-release v-band connector, enabling owners to effortlessly interchange between our German-made HJS 200-cell cats and competition pipes for track use. Translated from German, Rennkraft means “race power,” and these distinctive headers embody true street and racetrack functionality within an innovatively engineered package.


  • When equipped with Fabspeed’s 200-cell cats, drivers can expect a significantly louder exhaust note characterized by a more raw and aggressive sound. The higher frequency tones become more distinct, while deceleration burbles gain in robustness and transparency. With the installation of competition pipes, drivers can anticipate a sound reminiscent of a 911 CUP car rather than a typical Porsche street car, offering a volume that is assertive yet not overwhelming, with an aggressive and race-bred character. Even with the over axle GPF delete pipes installed, the stock muffler ensures there is no drone whatsoever.


  • Through extensive dyno development, it was determined that mid-length headers yield the highest power gains across the entire power band. Without any tune, in comparison to a stock vehicle, there was an increase of 31whp and 19ft/lbs at 7400rpm with sport cats, and 33whp and 24ft/lbs at 7200rpm with competition pipes installed. This translates to a remarkable gain of 33hp and 36hp, respectively, at the crankshaft. Additionally, peak horsepower rose from the baseline of 383whp to 405whp with the installation of HJS sport cats, and reached 409whp with competition pipes.


  • Impressive dyno proven power gains of 31whp and 19ft/lbs with the sport cats and 33whp and 24ft/lbs with competition pipes
  • Save 2lbs with sport cats and 7lbs with competition pipes compared to the factory headers
  • Modular design that uses a v-band clamp so one can quickly swap between configurations
  • F1 style high velocity merge collectors
  • Designed from 3D scans of the OEM headers for perfect bolt-on fitment
  • We use German-made HJS HD tri-metallic 200-cell EURO 6 homologated catalytic converters for the best performance and reliability
  • Optimized for maximum performance with no check engine light, guaranteed (sport cats)
  • No ECU tune required
  • Will fit with any brand of aftermarket exhaust system designed to work with the factory headers
  • Built 100% in house at Fabspeed Motorsport USA in Fort Washington, PA
  • Constructed from CNC mandrel-bent T304L stainless steel
  • Simple bolt-on installation, no cutting or welding required
  • All Fabspeed performance products are backed by the Fabspeed lifetime warranty


  • 2020+ Porsche 718 Boxster GTS: 982  |  4.0L F6
  • 2020-2023 Porsche 718 Cayman GT4: 982  |  4.0L F6
  • 2020+ Porsche 718 Cayman GTS: 982  |  4.0L F6
  • 2020-2023 Porsche 718 Cayman Spyder: 982  |  4.0L F6


  • All Fabspeed products are expected to ship within one week of order, though timelines are often much quicker
  • Installation of competition pipes may cause CEL (intended for race and or track use only)

About Fabspeed

Fabspeed Motorsport is situated in Fort Washington, Pennsylvania, within the United States of America. Their extensive 26,000 sqft. facility serves as a hub for various car clubs, including Porsche Club of America, Ferrari, McLaren, Lamborghini, and more. The company is renowned for its comprehensive approach to product development. They handle the entire process, from design and engineering to dyno testing, street trials, and racing assessments, ensuring the quality and performance of every item. Fabspeed also collaborates closely with race engine builders and tuners hailing from Italy, Germany, and the United States, resulting in the creation of the Ultimate Performance parts. To cater to their passionate global audience, Fabspeed meticulously crafts systems using aerospace-grade austenitic stainless steel, titanium, and carbon fiber materials, setting a standard for excellence in the industry.

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