Quote:
Originally Posted by chris_flies
Can confirm, I did swap to an M3 master cylinder, also with F30 front brakes, but still with stock 128i rears. Pedal feel is LIGHTYEARS better than before. The pedal grabs nice and high in its stroke, is firm and short, but still extremely easy to modulate. I haven't gotten on track yet to really test if there's any noticeable change in bias(for obvious reasons). Really happy with the change, but it was kind of a pain to do. Very small spaces and you need to undo bolts behind the pedals, which always sucks.
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Is there a reason you didn’t use any of the other brake cylinder components from the M3? I just bought a full MC, reservoir and booster assembly from eBay and will plan on doing the whole thing unless I find a specific reason not to.