Standard plastic bypass valves like those fitted to the Cooper S from the factory struggle to withstand increased boost pressures

Hub add-ons with hardware

even at a track

Blue TS-0208-1111

Clutch Kit - Xtreme Outback Extra Heavy Duty Sprung Ceramic 850Nm KNI28006-1BX JRX5 Standard plastic bypass valves likeXtreme Outback Heavy duty sprung ceramic kit 1BX Recommended for: Motorsport Applications Xtreme Outback Ceramic upgrades have been designed to offer the ultimate in heat capacity for single plate upgrades and are designed specifically for motorsport applications such as endurance rally events and time trials. Available in Sprung Ceramic and Cushioned Ceramic, there are a wide variety of options to choose from depending on the vehicle use.