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: 00651860490342 Brand Name: Bilstein Body Diameter (ID): 46mm Finish: Zinc Plated Adjustable Damping: Non-Adjustable Collapsed Length (MM): 389.0 Series: B8 5100 Extended Length (MM): 633.5 Boot Included: Black Straight Internal Design: Monotube Extended Length (IN): 24.94 Lower Mount Type: Eye 12mm Reservoir: No Collapsed Length (IN): 15.31 Spring Seat Included: No Body Design: Smooth Body (Non-Coilover) Upper Mount Type: Eye 12mm Extended Information: Country of Origin: Mexico 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: 4.8500 lb PDF: USA SDS_Shock_Air Spring_V2_EN Generic_instructions_02