The Brembo GT big brake kit fits the front with four-piston cast calipers and two-piece 355×32 mm drilled rotors in a red finish, intended to improve pad contact and rotor cooling during heavy use. This configuration is specified for 1987–1991 928 S4 and 928 GT applications, providing a clear vehicle-specific braking upgrade for those Porsche models.
Brembo 87-91 928 S4/GT Front GT BBK 4 Piston Cast 2pc 355x32 2pc Rotor Drilled-Red