The Bilstein B8 5100 series (24-187084) is a high-gas pressure monotube shock absorber specifically designed for lifted pickups, SUVs, and Jeeps. Featuring a 46mm digressive piston with self-adjusting deflective disc valving, it provides superior control and comfort on and off-road. This specific model is tuned for rear application on 1973-1991 GM K-Series vehicles with 4 inches of lift. Package contents: 1x Shock Absorber (24-187084), 1x Black Protective Bellows/Boot, Necessary Bushings and Washers for Installation. Finish: Zinc Plating.