The shop that did the work for me just did it. According to the Gripforce web site their pressure plate is a OEM pressure plate that they beef up the springs.
You can't do it with all single mass flywheels. The Gripforce setup uses F1 Racings flywheel and a pressure plate that has the same bolt and locator pin configuration as the stock clutch. Single Mass Flywheels such as JB Racing and UUC I think use non standard pressure plates but I am not positive about that.
You might check out the thread on the Valeo SMF conversion kit in the General E46 forum.
The only draw back with the stock clutch is that is uses a non-sprung hub clutch disk so the clutch engagement is a little bit harsher than with a sprung hub clutch disk.
It really did not take me long to adapt to it, I have been driving only manual transmissions for 40 years so I can pretty much feel how the clutch is engaging.
Last edited by ccj4467; 01-11-2013 at 10:05 AM.