Originally Posted by aviator
Just a curious ? ... is the backside of the adaptor machined out to accept that black plate with the 3 bolts? and how big a spacer is created when using them, do you need to roll the fenders or anything if you want to use stock bmw rims?
Yes the back side is machined to accept the black plate. Thr spacers are 18mm thick so expect that much to stick out. I ran 17" style 5s and needed my fenders rolled. The car also say on e46 steelies and I wouldn't say that a fender roll would have been needed.