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: 00651860597188 Brand Name: Bilstein Series: B8 5100 Extended Length (MM): 509.5 Adjustable Damping: Non-Adjustable Finish: Zinc Plated Extended Length (IN): 20.06 Internal Design: Monotube Body Design: Smooth Body (Non-Coilover) Reservoir: No Collapsed Length (MM): 325.3 Body Diameter (ID): 46mm Lower Mount Type: Eye 14mm Upper Mount Type: Eye 16mm Boot Included: Black Straight Spring Seat Included: No Collapsed Length (IN): 12.81 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