I'm building a track day focused manual N54 e92 and a planned upgrade for some time were the brakes. So when a full, barely used, kit of M2 brakes came my way, I decided to try and fit them on. However, such kit or the F30 M Performance kit was mostly retrofitted to e9x M3s, and the info on non-M fitting is almost non-existent.
Some general info first: Front calipers are the same from a F30 and M2/M4, but with 370mm discs for the F30 and 380mm for M2. The rear calipers differ between F30 and M2, and the discs are 340mm vs 370mm. I am mentioning this as there is more info on the F30 kit fitting in M and non-M e9x cars.
I have two questions/issues
Has anyone ran with the adapter kit available online (pics below) where the caliper bolts are 10mm instead of 12mm.
And is there an adapter kit for the rear ones or for someone to share which would be the best way to mount it with a custom made adapter.
Thank you
