This ACDelco Advantage brake disc rotor is a high-quality replacement part for your vehicle. It is designed to fit the rear, left, and right sides of your vehicle with a bolt pattern of 6 x 5.5 inches (6 x 139.7 mm). The rotor is made of cast iron material and has a non-directional finish. The 18A907A brake disc rotor has a disc thickness of 1.122 inches and a rotor outside diameter of 13.3 inches. It is compatible with various models and part numbers including 15727134, 177870, and 15712802. This OEM part is perfect for those looking for a reliable replacement without sacrificing quality.