The GiroDisc front caliper rebuild kit for 2014–2020 BMW M2/M3/M4 (F8X with blue calipers) is specified for 380mm rotors and supplies the parts needed to service and refresh the front caliper assemblies on those M cars. Intended to support caliper refurbishment, the kit helps restore caliper internals and braking hardware function for the listed F8X models with blue calipers.
GiroDisc 14-20 BMW M2/M3/M4 (F8X w/Blue Calipers) 380mm Front Caliper Rebuild Kit