SPEC (Star Performance Engineered Clutches) Stage 3 Clutch Kit for Nissan S13/S14 SR20DET. SPEC increases the clamping force of the pressure plate and uses a Carbon or ceramic friction surface on the disc hold more power, yet maintain close to the same street manners as a full faced organic disc. Uses 6 puck SPRUNG hub clutch disc. This clutch kit is designed to hold up to 515 ft/lbs or torque! This is the ultimate street/strip clutch kit. This is a complete kit including high clamp pressure plate, throw out bearing, and clutch alignment tool.