The Bilstein B12 (Pro-Kit) 11-17 BMW X3 xDrive35i L6 3.0L Front and Rear Suspension Kit is a complete suspension upgrade designed to improve the handling and performance of your BMW X3. This kit includes Bilstein B12 Pro-Kit sport shocks and struts, as well as progressive-rate Eibach Pro-Kit lowering springs. The combination of these components will dramatically reduce body roll in cornering, improve steering response, and provide a more comfortable ride. The kit also includes all necessary mounting hardware and detailed installation instructions.