The R1 Concepts Geo-Carbon drilled-and-slotted rotor is a single replacement intended for the rear-left wheel of 2006-2011 Buick Lucerne models. The product description names a Geo-Carbon rotor with drilled and slotted surfaces offered by R1 Concepts for that rear-left position. This listing reflects the explicit fitment and years in the source and presents the rotor as the rear-left replacement for the Lucerne vehicles cited.
R1 06-11 Buick Lucerne Rear Left Drilled & Slotted Geo-Carbon Rotor