Tapp H2 Kawi Secondary 11.5"The H2 Kawi TAPP Secondary Clutch comes fully assembled with a 44 50 38 inserts and orange secondary spring Orange Spring is rate for 135 350hp Note: Factory plastic cover will need modification to fit the secondary The Tapp Secondary features: Oversize Helix Diameter: Maximizes the clamping force on the belt. One of the largest issues with existing designs is that a small hub limits both the spring coil diameter as well as the maximum force the helix