SPEC Stage 2+ single clutch kit for 2005–2008 Porsche 911 (997.1) S and C4S includes components tuned for increased holding capacity over stock. The kit is intended as a direct-replacement clutch solution that works with factory-style hubs and provides a firmer engagement suited to drivers seeking stronger driveline clamping without extensive modification to the transmission system.
Spec 05-08 Porsche 911 997.1 S / C4S Stage 2+ Clutch Kit w/ Alternate Hub