The R1 Concepts Geo-Carbon drilled and slotted brake rotor for 1967–1974 Buick GS 400 (front left) is a replacement rotor that features the Geo‑Carbon drilled-and-slotted pattern indicated in the product title. It is intended for the front left position on those GS 400 model years; confirm your vintage model year and wheel side before ordering to ensure the rotor matches the application.
R1 67-74 Buick Gs 400 Front Left Drilled & Slotted Geo-Carbon Rotor