The Bilstein B8 5100 series gas pressure shock absorber is designed specifically as a direct fit upgrade for lifted trucks and SUVs. Featuring a 46mm monotube design, it provides consistent fade-free performance in various road conditions. This shock absorber is tuned for specific vehicle applications to achieve peak performance. High-pressure nitrogen gas technology ensures rapid reaction to road changes, providing superior control and comfort. Specifications: Installation position: Rear axle; Design: Monotube; Piston diameter: 46mm; Finish: Zinc plated. Single unit item. Part Number: 24-218030.