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The Brembo Rear GT big brake kit for 2001–2006 M3 applications upgrades the rear with a four-piston cast caliper and a 345x28 mm two-piece slotted Type 1 rotor in red. Tailored to the M3 rear axle, the kit replaces factory rear components to enhance brake modulation and rotor clearing under repeated use, supplied as a model-specific rear upgrade tied directly to the listed years.
Brembo 01-06 M3 Rear GT BBK 4 Piston Cast 345x28 2pc Rotor Slotted Type-1-Red
