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The Brembo big brake kit for 2011–2012 BMW 1M rear axle supplies four‑piston calipers with two‑piece cast rotors sized 380×28 mm featuring drilled faces, finished in black. Offered as a rear GT upgrade, the kit brings multi‑piston calipers and larger two‑piece rotors together in a direct replacement format that updates the rear braking hardware visually while increasing rotor and caliper capacity.
Brembo 11-12 1M Rear GT BBK 4 Piston Cast 380x28 2pc Rotor Drilled-Black
