ACT NX4-HDR6 HD Pressure Plate with Race Rigid 6-Pad Clutch Disc A low to moderate pedal feel; aggressive engagement with stock to low to moderate gear rattle Longer clutch life achieved through ACT's exclusive diaphragm design Premium ceramic friction materials provide low wear rates and high heat tolerance Recommended for race use only All ACT pressure plates are dynamically computer balanced for smooth operation at high RPM