The Brembo GT rear big brake kit for 2011–2012 BMW 1M refreshes the rear braking with a four-piston cast caliper and 380×28 mm two-piece rotors sized for direct fit. This variant uses slotted Type-1 rotors and a silver caliper finish as specified, supplying a rear replacement kit that matches the listed application and rotor style called out for these model years.
Brembo 11-12 1M Rear GT BBK 4 Piston Cast 380x28 2pc Rotor Slotted Type-1-Silver