I thought this was cool for about 5 minutes. Then realized that the money you spend on an M3 is not only for the drive train.
So not only are you stripping what you paid good money for, but you're spending money on making additions to make it track ready.
To top it off, one can search the used market and find bargains for a 997 GT3, and with some balls you can get the RS version (by balls I mean more money).
For what it is though...Awesome! Simply Awesome!