The R1 Concepts Geo-Carbon drilled-and-slotted rotor is a rear left direct-fit replacement specified for a range of Cadillac CTS models. Identified by its drilled-and-slotted surface and Geo-Carbon product naming, the rotor is intended for brake system service or replacement. It fits 2009–2024 Cadillac CTS rear left applications as listed in the source.
R1 09-24 Cadillac Cts Rear Left Drilled & Slotted Geo-Carbon Rotor