The Brembo rear big brake kit for 2006–2012 BMW 325i (excluding xDrive) pairs four-piston calipers with cast 345 x 28 mm two-piece slotted Type 1 rotors in a black finish. Specified for the listed 325i models, the kit replaces factory rear hardware with Brembo four-piston calipers and two-piece rotors as described in the product text.
Brembo 06-12 325i (Excl. xDrive) Rear GTS BBK 4 Piston Cast 345x28 2pc Rotor Slotted Type1-Black HA