The Bilstein B12 2010 BMW X3 xDrive30i Front and Rear Suspension Kit is designed to provide superior handling and improved ride quality for your BMW X3 xDrive30i. This kit includes two front and two rear Bilstein B12 Pro-Kit Sport shocks for a complete suspension upgrade. The shocks are designed to provide a sportier ride and improved handling, while also reducing body roll and improving cornering capabilities. The kit also includes two front and two rear Bilstein B12 Pro-Kit springs, which are designed to provide an improved ride quality and increased handling performance. This kit is the perfect way to upgrade your BMW X3 xDrive30i's suspension and improve its overall performance.