The Bilstein B12 2003 BMW 530i Base Sedan Front and Rear Suspension Kit is a high-performance suspension system designed to provide superior handling and stability for your vehicle. This kit includes two front strut assemblies, two rear shock absorbers, and a set of four springs. The struts and shocks are constructed from Bilstein's monotube design, which provides superior damping characteristics and a longer life span. The springs are designed to provide a comfortable ride while still maintaining excellent handling characteristics. This kit is designed to provide a smoother ride with improved handling and stability.