The R1 Concepts drilled-and-slotted black brake rotor for 1997–2005 Buick Century is specified as a direct replacement for the rear-left position. The listing indicates drilled and slotted surfaces with a black finish to match the catalog description—confirm your Century's model year and rear-left application to ensure this rotor fits your vehicle before ordering.
R1 97-05 Buick Century Rear Left Drilled & Slotted Black Brake Rotor