OEM style separate springs can't be used any more

4-port solenoid for use where a wide range of boost pressure is desired (5-40 psi for instance)

cost effective external wastegate – The Highest Flowing 50mm External Wastegate in the World

We now call it to "compression arm" as it compresses under a hard hit

Clutch Kit - Xtreme Performance Heavy Duty Organic 380Nm KNI24040-1A JR19 OEM style separate springs can'tXtreme 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 380Nm Clamp load Increased over standard Organic Friction Discs Heavy Duty Pressure