The Brembo rear big brake kit for 2009–2015 Cadillac CTS-V pairs four-piston billet calipers with 380 x 28 mm two-piece drilled, nickel-plated rotors. Sold as a rear GTR BBK, this complete kit replaces factory rear components with larger, two-piece rotors and billet calipers to help control heat and preserve pad contact under demanding use, offering a direct rear upgrade for CTS‑V models in the specified years.
Brembo 09-15 CTS-V Rear GTR BBK 4 Piston Billet380x28 2pc Rotor Drilled- Nickel Plated