I just tried to replace my stock muffler hangers with the M3 version. NOT HAPPENING. For anyone considering this, the chassis mounting bolts are too short and don't allow the nuts to go over the thicker mounting flange of the M3 hangers. The tip of the bolt doesn't even protrude from the surface of the flange hole. I'll have to figure something out . . I think the bolts are tack welded to the chassis; I don't have time right now to take the trunk apart to find out. If anyone knows, holla back. But for now I just put the old stock hangers back in . . . what a waste of time, oh well.