The R1 Concepts drilled black brake rotor for 2005–2011 Cadillac CTS (rear right) is provided as a replacement rear rotor for the passenger-side rear wheel. The product text highlights a drilled surface and black finish and explicitly lists this rotor for CTS applications from 2005 through 2011 at the rear-right position.
R1 05-11 Cadillac CTS Rear Right Drilled Black Brake Rotor