Xtreme Pressure Plate
Clamps load increase of 50% to 120%, Pedal feels moderate to stiff. Many SFI Certified to insure safety. Fits 04-07 Subaru WRX STi 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: 566 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: 724 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: 724 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: 724 FT LBS