The Bilstein B12 2013 BMW X1 sDrive28i Front and Rear Suspension Kit is a high-performance suspension kit designed to provide superior handling, stability, and ride comfort. The kit includes two front and two rear Bilstein B12 performance shock absorbers, two front and two rear progressive rate Eibach springs, and all necessary mounting hardware. The shocks are designed to improve handling, stability, and ride comfort, while the springs provide a progressive rate for a smoother ride. The kit is designed to provide a balanced and comfortable ride, while also providing improved performance and handling on any driving surface.