it allows for you to safely remove the locking collar on the wastegate without worrying about the spring preload force

This center cap only fits: JR12 (16"-17")

With optimized double shear design that provides low weight and high strenght

With this modification steering rack is moved forward

anti-squat

Clutch Kit - Xtreme Performance Extra Heavy Duty Sprung Ceramic Incl Flywheel KNI24511-1BX JR22 it allows for you toXtreme Performance extra sprung ceramic kit 1BX Recommended for: Motorsport ApplicationsThese kits are available with sprung ceramic friction discs and are designed for motorsport applications where higher heat and torque capacity is required. These can also be used in some road applications. Specifications: Torque capacity Clamp load Increased over standard Sprung Ceramic Friction Disc Extra Heavy Duty Pressure Plate Kit contains everything you need