The Brembo rear GT Big Brake Kit matches cast 4‑piston calipers with two-piece 345×28 mm slotted rotors in a Type 1 pattern with a red finish. It improves rear brake bite and helps control rotor temperatures during aggressive driving. This kit is listed for 2005–2012 Cayman applications and later 2006–2012 Cayman variants, noted in the source as 05-1ster/06-12 Cayman, for rear-fit BBK replacement.
Brembo 05-1ster/06-12 Cayman Rear GT BBK 4 Piston Cast 345x28 2pc Rotor Slotted Type1-Red