BMW M2 F87 / M3 F80 / M4 F82 BTCC Custom Rotor Bells – 368 mm × 36 mm for AP Racing CP9660 Calipers | XC3 Engineering 911 They provide a controlled medium

They provide a controlled medium friction level rather than an extremely aggressive initial response

high-grip tyres and longer sessions create more heat

BMW M2 M3 M4 F8X & G8X Chassis

factory mounts can shift over time - compromising toe

BMW M2 F87 / M3 F80 / M4 F82 BTCC Custom Rotor Bells – 368 mm × 36 mm for AP Racing CP9660 Calipers | XC3 Engineering 911 They provide a controlled mediumProduct Overview Upgrade your BMW M2, M3, or M4 (F80 F82 F87) with these bespoke BTCC spec rotor bells from XC3 Engineering. Machined from high quality 6082 T6 aluminium and designed to mount 368 mm 36 mm rotors with AP Racing CP9660 calipers our rotor bells make a big brake upgrade straightforward, precise, and reliable. Whether youre on a track build, clubsport car, or high performance road machine, these bells deliver accurate rotor alignment, heat