The Bilstein B8 5100 series (33-253237) is a high-performance 46mm monotube gas pressure shock absorber designed specifically for lifted light trucks and SUVs. Featuring a velocity-sensitive digressive piston that reacts to changing road conditions, it provides consistent, fade-free performance. This specific model is tuned for the rear axle of the 2015-2020 Ford F-150. Key features: Monotube design for superior heat dissipation, zinc-plated finish for corrosion resistance, and specific valving for vehicles with 0-2 inches of rear lift. Included in this package: 1 x Bilstein 33-253237 Shock Absorber, mounting bushings, and washers.