StopTech Sport Rotors are 1-piece direct replacement brake discs for factory brake systems and stock calipers. Slotting and drilling helps sweep away debris forming between the pad and disc, adds 'bite' and improves cooling performance. This is a Front Right (Passenger Side) rotor. For a complete axle set, this item should be paired with part number 127.62146L. Specification: Vented Drilled and Slotted, Zinc Coated Finish. Dimensions: 320mm Diameter, 30mm Thickness.