Description
The modular headers for the Porsche 911 feature a patented RENNKRAFT design with a quick-release V-band connector, allowing easy swapping between HJS 200-cell cats and race pipes for track use. These headers offer both street and racetrack functionality, with the ability to easily replace the HJS cats if needed. HJS German catalytic converters are European homologated, certified, and US EPA compliant.
![Fabspeed RENNKRAFT Modular Headers with Sport Cats for 991.1 Porsche 911 Carrera, GTS and S [FS.POR.991.MH.SC/FS.POR.991.MH.SCCB]](https://diamondusedparts.com/wp-content/uploads/2026/04/fabspeed-rennkraft-modular-headers-with-sport-cats-for-9911-porsche-911.jpg)





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