Originally Posted by baba louey
I don't understand your statement about why the flywheel has to be changed. Something about '08 being different from '09? Why not just get a new '08 clutch disk and pressure plate and keep the same flywheel? I've replaced several clutches on the various vehicles that I've owned and I've never felt it necessary to replace the flywheel. Of course I made the decision to not replace the flywheel after checking its condition thoroughly.
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.