Quick Overview 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. Attributes: GTIN: 00651860604763 Brand Name: Bilstein Spring Seat Included: No Adjustable Damping: Non-Adjustable Body Diameter (ID): 46mm Series: B8 5100 Upper Mount Type: Stem Boot Included: Black Bellows Reservoir: No Lower Mount Type: Eye 14.1mm Collapsed Length (IN): 13.52 Extended Length (IN): 21.46 Body Design: Smooth Body (Non-Coilover) Finish: Zinc Plated Extended Length (MM): 545.0 Collapsed Length (MM): 343.3 Internal Design: Monotube Extended Information: Country of Origin: United States Emissions : Released Life Cycle Status: Available To Order Packing Information: Quantity of Each: 1.0 Package UOM: EA Dimension: 26.8000 x 2.9500 x 2.9500 inches Weight: 4.8100 lb PDF: USA SDS_Shock_Air Spring_V2_EN Generic_instructions_02