Quote:
Originally Posted by The HACK
Problem with upgrading to a 335i caliper on a 328i is the master cylinder is designed to drive a smaller piston area. Now all of a sudden you increase the piston size front and rear and you will end up with piss poor pedal feel.
ANY brake upgrade involving changing out calipers, you must consider the overall size of piston area or else suffer a soft or limp brake pedal.
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Actually, realoem lists the same part number for the master cylinder on all the E90s.