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 02-05 Subaru impreza WRX 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:

Modified Street Disc:
Recommended for street or occasional race
Quicker Engagement
Quiet Operation
Improved friction material and hub strength
Torque Rating: 429 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: 549 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: 549 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: 549 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: 549 FT LBS