1989 and up 5.9L / 6.7L Cummins performance engine builds above 700 hp / 1,250 ft-lbs torque are recommended to use the new Fluidampr Cummins Full Power Kit. Highly recommended for drag racing and sled pulling. A ½” thick torque plate with textured finish mounts between the damper face and bolts to provide a wider and stronger clamping surface. The torque plate incorporates a 5/8” hex head for barring the engine over. New heat treated, high strength extended length ARP® bolts and a diamond impregnated friction washer are also included.