Bilstein B8 5100 shock absorbers are designed as a direct fit solution for lifted trucks and SUV's. These shock absorbers feature a monotube design which provides consistent fade free performance. B8 5100 shock absorbers utilize a unique, velocity sensitive, digressive piston which reacts to changing road conditions. All B8 5100 shock absorbers are tuned for each specific application to assure optimal performance is achieved. B8 5100 shock absorbers offer a significant improvement in ride quality, handling, and comfort. Due to their larger tires and a heightened stance, lifted vehicles place extra demands on a shock absorbers damping ability. The 5100 monotube design and patented digressive valving is uniquely suited to confront these demands. On or off-road, loaded or unloaded, Bilstein shocks instantly react to changing road inputs to maintain a stable, controlled, and comfortable ride. Bilstein's superior monotube high gas pressure design allows the excessive heat from the oil to transfer to the outer surface of the shock body and dissipate more efficiently. The dividing piston also permits the oil to expand as heat builds, preventing aeration (foaming) and viscosity loss. This allows the shock to maintain full damping characteristics as temperatures rise.