05-09-2024, 01:45 PM | #1 |
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M Performance Rotors with M Sport Brakes
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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05-09-2024, 02:55 PM | #2 | |
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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)
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2023 718 Cayman GTS 4.0 2019 718 Cayman Base 2015 M235 Manual On the list for the M2 CS Last edited by Tenac; 05-09-2024 at 03:05 PM.. |
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05-09-2024, 05:39 PM | #4 |
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You’re probably correct about the M8 (I haven’t checked), but I believe that the front calipers for the M Performance kit have only 4 pistons. This is based on viewing a picture of the calipers, as well as the pads being the same as for the M Sport.
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05-09-2024, 06:04 PM | #5 |
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I’m sorry, but I don’t have any quote for the M Sport brakes—they were stock on the car. I did get a parts quote for the complete M Performance brake kit ($4,000+), but haven’t asked about labor. I installed the kit on my previous M550i, and my vague recollection is that it was at least $700—i.e., not cheap. I don’t yet have a quote on parts for new rotors and pads, but should be less than half of the kit. Labor will be the same as installing new rotors and pads—fixed cost of $200 per axel. Hope this helps.
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05-09-2024, 06:25 PM | #6 | |
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05-09-2024, 06:39 PM | #7 | |
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2022 M8 Comp Convertible
2023 718 Cayman GTS 4.0 2019 718 Cayman Base 2015 M235 Manual On the list for the M2 CS |
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05-09-2024, 09:52 PM | #8 | |
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05-12-2024, 10:30 PM | #9 |
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I know this topic has been dealt with ad nauseum, and I thought I had a clear understanding—appears not. I had thought that my stock M Sport brakes (like a number of others), as well as the M Performance brake kit for my car, had fixed 2-piston calipers in the rear. Nope. They both appear to be floating single piston. This is especially curious in that I know that the M Performance brake kit I installed on my 2018 M550i had 2-piston rears, as I assume did the stock M Sports. I can’t help but wonder why (aside from cost—which, in a $110,000+ car, strikes me as a ludicrous concern) BMW would do this on their “flagship” coupe and associated gran coupe.
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05-14-2024, 06:29 PM | #10 |
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Now I’m really befuddled (not an unusual occurrence). Just read that M8C comes with single piston floating rear caliper, as well (although 6-piston up front where it counts most). Why is BMW scrimping on rear brakes in 8 series vs 5 (albeit with larger rotors)? Or do larger rotors trump calipers?
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