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The Brembo rear GT big brake kit for 2015–2018 M3 (excludes CC Brake) features four-piston cast calipers and 345x28 mm two-piece drilled rotors finished in yellow. Built to strengthen rear braking consistency and thermal control for the specified M3 applications, the two‑piece drilled rotors support heat dissipation and practical servicing while preserving the car’s original rear mounting interfaces.
Brembo 15-18 M3 Excl CC Brake Rr GT BBK 4Pis Cast 345x28 2pc Rotor Drilled-Yellow
