The R1 Concepts slotted brake rotor is a black replacement rotor for front-left braking service. Sold individually, the slotted design is specified in the listing to replace the original front-left rotor and restore a proper braking surface. This entry is called out for Buick 2013–2019 Regal front-left applications, providing the slotted rotor form required for that fitment.
R1 13-19 Buick Regal Front Left Slotted Black Brake Rotor