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. With years of experience and time-tested design, the BILSTEIN B8 5100 shock absorbers combine the perfect amount of off road dependability with smooth, on road driving and affordability. Each shock absorber has been tested and tuned to your specific vehicle. Set of 4 Shocks - compatible with 4WD Vehicles 4-6" Front Lift and 3" Rear Lift. Shock boots included with all shocks except in cases of special fitment. Monotube gas charged for longevity, durability, and performance. All necessary washers, bushings, and nuts included. Factory shock mounting bolts are reused for installation. Bilstein's Limited Lifetime manufacturer's Warranty protects against defects and premature failure.