The ACT 6 Puck Sprung Clutch is perfect for built motor setups that need that extra torque capacity.  At 650ftlb rating you can't go wrong with the ACT 6 Puck.  Includes Monoloc Collar.

Disc Diameter (in): 9.4 Disc Diameter (mm): 240 Disc Type: Race Disc Pressure Plate Type: Heavy Duty Product Weight (lbs): 17.7 Product Weight (lbs.): 17.7 Spline Count: 23 Spline Size (in): 1 Torque Capacity (ft/lbs): 650 Torque Capacity (ft/lbs.): 650 Torque Capacity Over OE: 80%