The Brembo GT rear big brake kit for 2011–2012 BMW 1M updates the rear with a four-piston cast caliper and 380×28 mm two-piece rotors sized for direct replacement. This option features slotted Type-3 rotors and a silver caliper finish as specified, providing the rotor pattern and caliper color matched to the listed rear application for those model years.
Brembo 11-12 1M Rear GT BBK 4 Piston Cast 380x28 2pc Rotor Slotted Type-3-Silver