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: 00651860651040 Brand Name: Bilstein Upper Mount Type: Stem Spring Seat Included: No Extended Length (IN): 15.76 Body Diameter (ID): 46mm Extended Length (MM): 400.2 Boot Included: Black Bellows Lower Mount Type: Eye 14.1mm Collapsed Length (IN): 11.30 Body Design: Smooth Body (Non-Coilover) Series: B8 5100 Finish: Zinc Plated Internal Design: Monotube Adjustable Damping: Non-Adjustable Collapsed Length (MM): 287.0 Reservoir: No 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: 22.4500 x 2.9500 x 2.9500 inches Weight: 4.3000 lb PDF: USA SDS_Shock_Air Spring_V2_EN E4-WM5-Y217A00