The Brembo Big Brake Kit is a rear brake upgrade that pairs 4-piston cast calipers with two-piece 345x28mm Type1 slotted rotors finished in black, supplied as a direct-fit replacement. This GT 4-piston configuration is specified for rear applications on 2006–2012 BMW 325i and 328i models (excluding xDrive), matching factory mounting for a bolt-on upgrade.
Brembo 06-12 325i/328i (Excl. xDrive) Rr GT BBK 4 Piston Cast 345x28 2pc Rotor Slotted Type1-Black