Dude this was a while ago, were talking maybe high 300 horsepower, and the stage 2 was recommended, and replaced with another stage 2 by SPEC, who knows my combo. The stage 3 is also suppose to have a billet steel flywheel used with that clutch system, and about 5 years ago billet steel flywheels were going for well over 400.00. I wasnt game with that.