Quote:
Originally Posted by Gr8 Ape
I’ve talked with my BMW parts guy, and he’s checked the difference between my stock M Sport brakes and replacement M Performance brakes. He assures me that the rotors are the same size and the calipers 4 piston front and 2 piston rear in both. I’d like to swap out the old rotors for new, slotted M Performance rotors. He’s told me it shouldn’t be a problem. My only hesitation is the front calipers. Although the same number of pistons, the Reds are a bit larger. Does anyone know whether the difference between the calipers (or of any other reason) why this wouldn’t work? Thanks in advance.
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Not sure if it would be any issues for sure because I don't have the diameter or thickness numbers in front of me but the M8 are 6 Piston calibers not 4 up front. don't remember the rear.
So I can't seem to find the numbers for the 8 series but it does look like commonly there is difference in size between the the two so I would triple check the specs.
Example: For the 3 series.
M sport rotors:
Front: 340mm rotors, 4-piston Brembo caliper painted blue
Rear: 345mm rotors, 2-piston Brembo caliper painted blue
M performance rotors:
Front: 370mm rotors, 4-piston Brembo caliper (yellow/gold, orange, or red color)
Rear: 345mm rotors, 2-piston Brembo caliper (yellow/gold, orange, or red color)