Absorber The Bilstein B6 Performance 13-15 BMW X5 Front Monotube Shock Absorber is a high-performance shock absorber designed to provide greater control and stability for your BMW X5. This shock absorber features a monotube design which helps to reduce the risk of fading and provides superior damping ability. Its self-adjusting deflective disc valving ensures consistent performance and improved handling. The shock absorber is constructed from high-strength steel and is corrosion-resistant, allowing for a longer lifespan. Its gas pressure technology helps to reduce the risk of cavitation and offers improved performance in all driving conditions.