The R1 Concepts Geo-Carbon drilled-and-slotted rotor is a Geo-Carbon replacement brake rotor with drilled holes and slots to aid contact surface cleanliness. This rotor is specified for rear left fitment on 1997–2005 Buick Regal models and is intended to replace the factory rear left disc on those vehicles.
R1 97-05 Buick Regal Rear Left Drilled & Slotted Geo-Carbon Rotor