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: 00651860599113 Brand Name: Bilstein Spring Seat Included: No Adjustable Damping: Non-Adjustable Upper Mount Type: Eye 16mm Extended Length (IN): 21.65 Finish: Zinc Plated Collapsed Length (MM): 351.5 Reservoir: No Collapsed Length (IN): 13.84 Extended Length (MM): 550.0 Internal Design: Monotube Boot Included: Black Straight Series: B8 5100 Body Design: Smooth Body (Non-Coilover) Lower Mount Type: Eye 14.1mm Body Diameter (ID): 46mm 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: 4.6300 lb PDF: USA SDS_Shock_Air Spring_V2_EN Generic_instructions_02