Good I assumed you had fitted and were driving around on them looking at your pictures,D4dawg wrote:1: these 135i rear calipers ARE NOT GOING ON MY CAR and up for sale
2: guido or similar name has fitted these to the rear of his 3.0 his post in e85/86 area so could be worth a read
3: They do fit lugs on rear perfectly and rear lugs could be slotted to move them in the 17mm difference between 328 csl disc v 345 they are designed to fit or pads machined to remove 5mm off excess hence doesn't catch edge of disc
Or fit a 345 disc and fit perfectly
4: I have bought brembo 4pots to fit my rear
In there current state (as per picture) they are dangerous and I would not be using them, i'm sure with some fettling and special brackets they could work.
Good luck with your 4 Pots