The Bilstein B4 Series 19-266572 is a premium gas-pressure shock absorber designed to restore the original ride qualities of your vehicle. Engineered as an OE replacement, it utilizes a twin-tube design to provide consistent handling, safety, and comfort. This part is specifically tuned for the 2011-2017 Ford Explorer rear suspension. Kit contents: 1x Shock Absorber (19-266572). It is recommended to replace shock absorbers in pairs to ensure optimal suspension performance and vehicle stability.