I'm selling the front OEM carbon ceramic brake calipers from my 2016 F80 M3. They were ran for less than 2,500 miles. They will also work on an F82 M4 and might be able to retrofit on a F3x car (please verify prior to purchase).
These are in excellent overall condition. Just a few very very tiny dings from disassembly but very hard to see. Great if you're looking to upgrade to the carbon ceramic rotors for your M or want to do a custom setup. Will ship for free in the US.