spec stage 3 has held up to 454hp / 335Tq in my car with no problems. they have a much better pedal feel than ACT as well. my clutch has a pedal pressure that is the same as stock yet has a torque holding capacity that is almost 200% of what the stock is. i would not get their stage 1 as i have heard of problems with that. but the rest of the line is tip top!!

Scott