I understand that the z4 M series shares the same powerplant with a BMW M3. Several companies produce turbocharger or supercharger kits for the E46 M3. Could such kits be fitted to a z4 M? Would there be difficulty in adding such super or turbochargers due to the size of the Z4? I also appolagize if this new thread should be in the M series forum, however, I am only using the Z4 M's powerplant as an example. Any input would be helpful. Thanks.