The Brembo GT rear big brake kit for 1999–2004 996 provides rear cast four-piston calipers and two-piece 345×28 mm drilled rotors in silver for those model years. The overview identifies the kit and explicit vehicle application for clarity. This package pairs cast 4-piston calipers with drilled two-piece 345×28 mm rotors in silver; confirm hub and wheel fitment before installation.
Brembo 99-04 996 Rear GT BBK 4 Piston Cast 345x28 2pc Rotor Drilled-Silver