I do believe they play a large role.
I don't think you can simply swap M3 strut mounts though. IIRC camber would be off, and they don't accept standard diameter springs (unlike non-M mounts)
I don't know if they're any stronger, but it looks like E30 mounts may fit.
Last edited by TerraPhantm; 12-09-2012 at 01:35 AM.