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: 00651860636078 Brand Name: Bilstein Body Diameter (ID): 46mm Reservoir: No Collapsed Length (MM): 410.5 Spring Seat Included: No Collapsed Length (IN): 16.16 Adjustable Damping: Non-Adjustable Finish: Zinc Plated Series: B8 5100 Upper Mount Type: Eye 14.4mm Body Design: Smooth Body (Non-Coilover) Extended Length (IN): 26.14 Extended Length (MM): 664.0 Boot Included: Black Bellows Lower Mount Type: Eye 14.4mm Internal Design: Monotube Extended Information: Country of Origin: Mexico Life Cycle Status: Available To Order Emissions : Released Packing Information: Quantity of Each: 1.0 Package UOM: EA Dimension: 26.8000 x 2.9500 x 2.9500 inches Weight: 5.4000 lb PDF: USA SDS_Shock_Air Spring_V2_EN Generic_instructions_02