The R1 Concepts drilled-and-slotted black brake rotor for 1990–2005 Buick Skylark is described as a direct replacement for the front-left position. The listing identifies a drilled and slotted braking surface with a black finish intended to match the original specification—check your Skylark's model year and the left-front application to confirm fitment before ordering.
R1 90-05 Buick Skylark Front Left Drilled & Slotted Black Brake Rotor