The Bilstein B6 2013 BMW X1 xDrive28i Rear Shock Absorber is a high-performance shock absorber designed specifically for the 2013 BMW X1 xDrive28i. This shock absorber is designed to provide superior handling and stability, while reducing body roll and improving ride comfort. It is constructed from a monotube design with a gas-pressure construction, which ensures maximum damping response and performance. The shock absorber is also corrosion-resistant and features a zinc-plated finish for durability.