The R1 Concepts Geo-Carbon drilled-and-slotted rotor is a single replacement for the front-left wheel of 1994-2001 Buick Regal applications. The product description names a Geo-Carbon rotor with drilled and slotted surfaces offered by R1 Concepts for the left-front position. This overview reflects the explicit fitment in the source and presents the rotor as the front-left unit for the Buick Regal models and years cited.
R1 94-01 Buick Regal Front Left Drilled & Slotted Geo-Carbon Rotor