The product is an 8.8 inch Differential Cover Rear End Girdle System designed specifically for 1979-2004 Ford Mustangs. Made of aluminum, this direct replacement kit includes the Differential Cover Rear and Girdle components. The manufacturer, Ralbox, offers a 1-year warranty for this high-quality rear end system. With a bore diameter of 8.8 inches, this system is compatible with Ford Mustang models and ensures a secure fit for optimal performance on the vehicle's rear axle.