The Bilstein B4 Series 22-139191 is a high-quality gas pressure suspension strut designed to restore the original handling characteristics and comfort of your vehicle. Engineered to provide optimum safety and stability, this shock absorber utilizes Twin-Tube technology for consistent performance. This is a single front suspension strut assembly. To ensure balanced performance, it is highly recommended to replace struts in pairs. Features: Gas Pressure Technology, constant damping power under any load, high power reserves for maximum safety. Included in the box: 1x Bilstein B4 Front Strut Assembly (Art. No. 22-139191).