The Bilstein B6 07-13 BMW X5 / 08-14 BMW X6 Monotube Shock Absorber is a high-performance suspension upgrade designed to improve the handling and ride quality of your BMW X5 or X6. This shock absorber features a monotube design that is gas-pressurized to provide consistent damping regardless of road conditions. The shock absorber is constructed with a corrosion-resistant zinc finish and is designed to provide improved handling and stability, even in the most extreme conditions. The shock absorber is easy to install and is backed by a limited lifetime warranty.