Heavy Duty Pressure Plates give you a clamp load increase of 20% to 50%, Pedal feels stock to moderate, Many SFI Certified to insure safety. These clutch kits fit all EVO 8/9 models. Below you can find information on the different type of clutch discs you can choose with this kit and the torque rating they can handle: Performance Street Disc: Recommended for street and race Quicker engagement Quiet operation Best organic friction material, improved hub, and burst strength Torque Rating: 508 FT LBS 4 Puck Sprung Hub: Recommended for road racing Increased torque capacity and spline life Quiet operation, reduced driveline shock Harsh Engagement, chatter Torque Rating: 651 FT LBS 6 Puck Sprung Hub: Recommended for road racing and high power street use Increased torque capacity and spline life Quiet operation, reduced driveline shock Harsh engagement, chatter Torque Rating: 651 FT LBS 4 Puck Unsprung Hub: Recommended for drag and road racing use Increased torque capacity Fastest shifts, low inertia Good durability, but shortened spline life Harsh engagement, chatter Torque Rating: 651 FT LBS 6 Puck Unsprung Hub: Increased torque capacity Faster shifts, reduced inertia Very good durability, but shortened spline life Absorbs more heat then 4 puck pad Harsh engagement, chatter Torque Rating: 651 FT LBS