592 HP/687 ft lb with a 496B. It is in ~3600 # Challenger set up for handling with 200 TW tires and sees extended WOT in 3'rd and 4'th on the track. The clutch is a single disc setup from Silver Sport with iron face pucks on one side and Kevlar/copper on the other from memory.

This replaced a simpler clutch... basically a 10.5" Chevy clutch with high friction lining from old Keisler. That clutch held OK but was starting to crack in the web around the disc hub.

When I had the engine freshened (+ new clutch), torque increased and I am actually exceeding Silver Sport rated clutch torque capacity. It works OK as long as I fully lift on shift. I'll get something stouter next time... probably twin disc/dual friction of some type.