The Brembo GT Big Brake Kit for 2009–2016 BMW Z4 sDrive 28i, 30i and 35i applications upgrades the front brakes with four-piston cast calipers and 365×29 mm two-piece drilled rotors in black. Supplied as a matched front axle set, the kit replaces OE front components to accept larger braking hardware while using factory mounting locations to assist installation.
Brembo 09-16 Z4 sDrive 28i/30i/35i Front GT BBK 4 Piston Cast 365x29 2pc Rotor Drilled-Black