The Brembo GT rear big brake kit for 2001–2006 M3 fits the rear with cast four-piston calipers and two-piece 345×28 mm drilled rotors in silver. The overview identifies the kit and explicit application to help shoppers confirm compatibility. Included are cast 4-piston calipers and drilled 345×28 mm two-piece rotors in silver; check rotor hat fit and wheel clearance prior to purchase.
Brembo 01-06 M3 Rear GT BBK 4 Piston Cast 345x28 2pc Rotor Drilled-Silver