The Brembo Big Brake Kit for 2004–2017 Subaru WRX STI applications is a front GTS upgrade pairing cast six-piston calipers with 355×32 mm two-piece rotors in a slotted Type-3 black finish. The two-piece rotors and multi-piston calipers increase thermal capacity and produce a firmer, more consistent pedal feel to help manage fade during enthusiastic street or track use, while remaining a direct front replacement.
Brembo 04-17 WRX STi Front GTS BBK 6 Piston Cast 355x32 2pc Rotor Slotted Type3-Black HA