| Some people have been using the Clutchmasters FX700 with decent results. I have this clutch in my M3 which makes 633rwhp. The engagement can be a bit tricky on take off being a twin disc setup, but at this power level, it is difficult to find a clutch without some compromises. The good news is, the FX700 makes very little noise compared to some of the other options out there. I had a UUC prior when I was putitng down about 560whp and it barely held. It performed nicely though as far as engagement. When I moved up to a GT40R, the UUC had no chance of survival.
The clutch options out there for BMWs leave a lot to be desired.
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