The Bilstein B8 5100 series (33-151670) is a high-gas pressure monotube shock absorber specifically designed for lifted pickups, SUVs, and Jeeps. Featuring a 46mm digressive piston with a self-adjusting deflective disc valving, it offers superior control and comfort on and off-road. This shock is tuned specifically for the Jeep Grand Cherokee (ZJ) chassis to ensure optimal performance. This item is sold as a single unit. Individual Part Number: 33-151670. Specifications: 46mm Monotube Design, Rear Position, Zinc Plated Finish.