I had a RAM powergrip Hd clutch set and new flywheel set.
Did not like approx. 700ft/tq. (Nitrous)
The RAM clutch melted to flywheel and ram gave me back a 1/3 of the price
I paid back after a year long protest.
Had spec 3+ 11 inch for 2 years absolutely no slippage but on/off clutch.
Now have spec 3 10.5 inch clutch which is less forgiving the 3+ on street
Spec clutches does have a race warranty