The R1 Concepts Geo-Carbon drilled-and-slotted rotor is a replacement supplied for the rear-left wheel of 2011-2016 Buick LaCrosse applications. The product description identifies a Geo-Carbon rotor with drilled and slotted surfaces offered by R1 Concepts for the rear-left position. This overview follows the explicit LaCrosse fitment and years in the source and presents the rotor as the rear-left replacement unit for those vehicles.
R1 11-16 Buick Lacrosse Rear Left Drilled & Slotted Geo-Carbon Rotor