I run Clutchmasters clutches exclusively.
Had a stage 4 on my civic for 2years, pulled it out to repair the tranny. Bought another to swap in just to do it since the tranny would be out. Mic'd it...same thinkness as the new one! Like 8 track days, 10 drag evens, street raced on it...I had it on with one of their alum flywheels. Their stuff is top notch.
I cant wait until they come out with one for the WRX.