The Bilstein B8 Performance Plus 13-17 BMW X5 / 14-18 BMW X6 Front Shock Absorber is a high-performance shock absorber designed to provide superior performance and handling for your BMW X5 or X6. It features a monotube design with a threaded body, allowing for adjustable rebound and compression damping. The shock absorber is constructed from high-quality materials and is designed to reduce body roll, improve steering response, and provide a smooth and comfortable ride. This shock absorber is an ideal choice for those looking to upgrade their suspension system and improve their vehicle's performance.