The Brembo GT rear big brake kit matches a four-piston cast caliper to a 345x28 mm two-piece drilled rotor to improve rear braking for 2006–2012 325i models (excluding xDrive). The drilled 2pc rotor and cast 4-piston caliper are finished in red, providing a tailored replacement aimed at better heat management and firmer brake modulation for street and occasional track use.
Brembo 06-12 325i (Excl. xDrive) Rear GT BBK 4 Piston Cast 345x28 2pc Rotor Drilled-Red