The Brembo front GT big brake kit for 2017–2023 540i applications features six-piston cast calipers and 405×34 mm two-piece slotted Type1 rotors finished in yellow. As a front direct-fit upgrade, it enlarges rotor diameter and adds multi-piston clamping to improve braking feel and thermal control during aggressive driving. The two-piece slotted rotors provide enhanced cooling and simplify maintenance.
Brembo 17-23 540i Front GT BBK 6 Piston Cast 405x34 2pc Rotor Slotted Type1-Yellow