The R1 Concepts Geo-Carbon drilled-and-slotted rotor is a Geo-Carbon replacement brake rotor with drilled holes and slots to assist surface evacuation. This rotor is specified for rear left fitment on 2005–2006 Pontiac GTO models and is intended to replace the factory rear left disc for those years.
R1 05-06 Pontiac GTO Rear Left Drilled & Slotted Geo-Carbon Rotor