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Wow didn't realize the calipers are that much bigger.
When i had a loaner X5 40i the braking sucked big time compared the X5M. It wasn't even in the same realm in the braking department.
One thing you might want to look into coding for the M brakes. When i modified my F15 X5 with the Mperformance brakes which were alot bigger than the stock brakes, they actually felt worst than stock. Pedal feel was soft as if there was air in the system. There is a specific coding procedure that needed to be done (i found out afterwards) that increases the master cylinder pressure to compensate for the larger calipers. Once i did the coding it felt as it should and braking improved dramatically. Just wondering if it is possible to code for X5M brakes on your M50i. worth looking into.
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