The Bilstein B12 2013 BMW X1 xDrive28i Front and Rear Suspension Kit is a complete set of suspension components designed to improve the handling and overall performance of the BMW X1 xDrive28i. The kit includes two front struts, two rear shocks, and two rear springs. The struts and shocks are constructed from monotube technology, which provides superior dampening and rebound control for improved handling and stability. The springs are designed to provide a comfortable ride while still maintaining a sporty feel. This kit is ideal for those looking to improve their X1's performance without sacrificing comfort.