This center cap originally fits: JR5 and JR3 (18x8

Higher roll center (RC)

Utilising our Stainless Steel Valve Seat & Milspec Diaphragm the FPR10 Series is suitable for all Fuel types including Race Fuel and aggressive leaded fuels

but this would mess up the original factory designed kinematics

Clutch Kit - Xtreme Performance Heavy Duty Organic 550Nm KCR27001-1A JR5 This center cap originally fits:Xtreme Performance sprung organic kit 1A Recommended for: Street use in vehicles with minor engine modifications. Sprung organic clutch kits offer exceptional driveability for vehicles used daily but also have performance modifications. The sprung organic disc offers improved dampening which reduces the shock loading on the transmission. Specifications: Torque capacity 550Nm Clamp load Increased over standard Organic Friction Discs Heavy Duty Pressure