while one vent-to-atmosphere port gives the classic Turbosmart blow-off valve sound we know and love

piston-based valve

Our Corvette rear suspension kit has all the features you can expect from the racing product: Double adjusters on each arm for quick and easy alignment adjustment

A direct fit high performance replacement for the factory plastic unit

This kit will fit the following F-Series models:BMW F20BMW F21BMW F22BMW F30BMW F32BMW F33BMW F36

Clutch Kit - Xtreme Outback Extra Heavy Duty Sprung Ceramic KFD23006-1BX JR20 while one vent-to-atmosphere port givesXtreme 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.