Originally Posted by auggiem3
In 2009, BMW replaced the '08 clutch/flywheel setup and discontinued production of the '08 OE clutch plate. Hence, if you want an OEM replacement for an '08, the only e90/e92 M3 clutch currently in production is a larger setup requiring a pairing to the '09 flywheel.
If you wanted to go aftermarket or source one from a junked M3, those alternatives are obviously still possible.
There must have been a weakness of some sort with the older set up for BMW to cease production of those parts. It sounds like the aftermarket have picked up where BMW left off.
I tend to agree with your comment that tracking is not particularly hard on the clutch unless one is 'speed' shifting all the time. One problem I had with my old RX7's clutch at the track was that it would get too hot and start to shudder when leaving the pits from a dead stop. A switch to an aftermarket disk/plate fixed that problem.