STREET, DRAG, PULLING, AUTOCROSS Features a full-metallic disc with the highest possible friction co-efficient. Street drivable but not street-friendly. The hub is solid 12-rivet and the assembly is heat treated for strength and durability. Best for extreme street and drag racing. High clamp pressure plate Full-metallic friction material High torque solid hub and disc assembly Bearing and tool kit Additional Flywheel Part # REQUIRED: Steel - SY83S-4