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The Brembo Rear GT big brake kit for 2011–2012 1M applications installs a four‑piston rear caliper with a two‑piece 380×28 mm cast rotor featuring a drilled face and silver finish. Specified as a rear GT BBK, the kit lists rotor size and construction, providing the rear brake configuration detailed for the 1M model years cited in the description.
Brembo 11-12 1M Rear GT BBK 4 Piston Cast 380x28 2pc Rotor Drilled-Silver
