The Brembo rear GT big brake kit for 2011–2018 Porsche Cayenne S/GTS supplies a rear braking upgrade with four-piston cast calipers and two-piece 380x28 mm rotors. These are slotted Type 3 rotors finished in black according to the listing. The overview reports rotor dimensions, piston count and slotted rotor type so buyers know the kit configuration for the rear axle.
Brembo 11-18 Cayenne/S/GTS Rear GT BBK 4 Piston Cast 380x28 2pc Rotor Slotted Type3-Black