The Brembo GTS rear big brake kit for 2015–2018 BMW M3 (with CC brake equipment) supplies four-piston cast calipers and 380 x 28 mm two-piece slotted rotors in Type-1 black. Specified as a rear axle assembly, this kit provides larger rotor area and multi-piston calipers to improve rear braking balance and thermal handling on M3 models equipped with the corresponding factory brake system.
Brembo 15-18 M3 (CC Brake Eqpt) Rr GTS BBK 4Pis Cast 380x28 2pc Rotor Slotted Type1-Black HA