1986-00 Ford Mustang V6 & V8 w/6-bolt flywheel 10.5 in. diameter, 10-spline;Great drivability for power levels up to 450 horsepower; Smooth, chatter-free operation using top quality organic composite friction surface material; Upgraded damper springs gives up to 30% more clamping pressure than stock OE clutch; Clutch disc features heavy duty hub assembly for increased load capacity; All Street 450 clutch kits come complete with pressure plate, disc, release bearing, and alignment tool unless otherwise noted;