The Brembo big brake kit for 2006–2012 BMW 325i (excluding xDrive) is a rear GTR upgrade featuring a four-piston billet caliper with a 345x28mm two-piece slotted Type3 rotor in nickel. Listed as a rear BBK for the specified 325i models, the kit pairs billet calipers and slotted two-piece rotors finished in nickel to match the fitment information provided.
Brembo 06-12 325i (Excl. xDrive) Rear GTR BBK 4 Pist Billet 345x28 2pc Rotor Slotted Type3- Nickel