Originally Posted by SuperBmw
I know the 135i brakes can fit onto the 335i front, but do you also have to swap over the rotors?
I wanted to keep the bigger rotor of the 335i, but I had a bmw performance front caliper set I wanted to install. I realize the pad sweep area will be smaller, but I have zinc coated rotors that won't rust in the unswiped areas so that's not a concern.
As long as the caliper can fit over top of the rotor without the size of the larger rotor causing problems I'd give it a shot.
Without a custom bracket it isn't going to fit on a 335i rotor.