I have a Boxster S 987 with a 3.8 X51 engine and I use sachs clutch. The clutch was excellenent but now I have 10.000km and it needs replacement. When it is heated after one hour of driving the clutch slips on 4rth,5th and 6th after 4.000rpm.

Is there another performance clutch that I could use that would may last longer?
What clutch does any of you use once you have upgraded your car?

Michael