Ceramic/Ceramic 550HP / 1000 Ft-Lbs. Tq These clutches utilize ceramic buttons on both sides of the clutch disc and are aimed at the performance trucks. Driving manners are very performance oriented with no clutch slip, basically the clutch is in, or it is out. Great holding capacity for modified trucks, the only way you will get more holding power is to go to a Dual Disc Clutch setup. Ceramic is a very hard material so typically flywheel wear is more noticeable using a ceramic clutch than with other materials. This clutch has a small window of usage, ideally suited to trucks with performance power modifications that do not intend to tow with their truck. If you plan on drag racing/ sled pulling or doing boosted launches you will need a Dual Disc Clutch. For use on NV4500 5-Speed Transmission. Features: 12.25″ x 1.25″ Performance Replacement Ceramic Buttons HD Spring Hub Rated @ 550HP / 1000 ft lbs Torque 3800# Pressure Plate Kit includes: Pressure Plate, Clutch Disc, Release Bearing, Pilot Bearing and Alignment Tool.