Hi All,I drive a '92 318i (M40).I realised that there are different strut bars for the M40, M43, and M50 engines. What are the main differences? Can i purchase a strut bar for a 6 cylinder and fit them to a 4 cylinder unit? I'm asking because I know M-Tech makes them for the 6 cylinders and not for the 4 cylinders. Was also exploring the idea of fitting an X brace as well, however I did notice that it was designed for the 6 cylinder models also. Are there any major clearance issues? Hope the experienced bunch would be able to shed some light. Planning to do some track work so was thinking of beefing up the chassis a bit.Cheers!