The Brembo GTS big brake kit for 2015–2023 Ford Mustang GT (S550) front applications combines a six-piston cast caliper with 405×34 mm two-piece drilled rotors in black. Specified for the front, this kit uses increased rotor diameter and multi-piston clamping to promote more consistent braking under spirited or sustained driving. The drilled rotor configuration and finish match the product listing.
Brembo 15-23 Mustang GT (S550) Front GTS BBK 6 Piston Cast 405x34 2pc Rotor Drilled-Black HA