The Brembo big brake kit for 2015-2018 BMW M3 models without carbon-ceramic brakes upgrades the rear with a four-piston billet caliper and a two-piece 380x28 mm drilled nickel rotor. Specified as a direct rear replacement for non-CC-equipped M3s, the drilled rotor improves cooling and pad bite while the billet caliper boosts clamp stability for more consistent braking under aggressive driving.
Brembo 15-18 M3 Excl CC Brakes Rr GTR BBK 4Pis Billet 380x28 2pc Rotor Drilled-Nickel