charmer006 - on Centerforce's website, you'll find the clutch for a Viper. The PN # will lead you to a Technical Insert about the break in procedure, and that the clutch discs "ARE DESIGNED TO BE USED ON O.E. FLYWHEELS AND BILLET STEEL FRICTION SURFACES ONLY! FAILING TO FOLLOW THESE INSTRUCTIONS WILL VOID MANUFACTURES WARRANTY AND MAY RESULT IN PREMATURE WEAR."
I have an Apex Motorsports (not in the Viper business anymore) kevlar clutch and a lightened flywheel. My car recently dyno'd (before clutch started to slip) at 620 rwhp and 829 rwtorque (NX wet kit 200 shot). I don't think the torque was affected by the lightened flywheel, but I'm not sure since I didn't get to dyno with stock clutch/flywheel.
After about 8k miles and several trips to the drag strip this year, my clutch/flywheel is showing signs of wear. I'm also searching which brand to go with...