The basic RAM concept of clutch performance is simple: Increased clamp pressure is the single most effective way to manage high horsepower or load, especially in street driven performance cars. We purpose build RAM HDX pressure plates with 30% more clamp pressure than stock. The second important feature is smooth, chatter free operation, which we achieve with premium organic composite disc friction material. Also, HDX discs feature our exclusive 8-spring hub assembly for added load capacity. HDX. Great driveability and control for power levels to 450 horsepower. Sets include pressure plate, disc, release bearing, and alignment tool unless otherwise noted.