The Brembo GTS rear big brake kit for 2001–2004 996 C4S applications upgrades the rear brakes with a four‑piston cast caliper and two‑piece 380 x 28 mm drilled rotors in black. This rear kit increases rotor size and caliper capacity over many factory rear components, offering a direct‑fit solution intended to balance front and rear braking when combined with compatible front upgrades.
Brembo 01-04 996 C4S Rear GTS BBK 4 Piston Cast 380x28 2pc Rotor Drilled-Black HA