Because of this precision

Stainless Steel Valve Seat

Yellow Spring rated -22 to -20 InHg (installed)

and Orange Spring (Inner -8 InHg)

Clamp load 550Kg 40% Increased over standard

Clutch Kit - Xtreme Outback Extra Heavy Duty Sprung Ceramic KTY30005-1BX JR40 Because of this precisionXtreme 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.