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: 00651860614243 Brand Name: Bilstein Series: B8 5100 Spring Seat Included: No Extended Length (MM): 618.0 Finish: Zinc Plated Adjustable Damping: Non-Adjustable Upper Mount Type: Eye 14.1mm Reservoir: No Extended Length (IN): 24.33 Boot Included: Black Bellows Body Design: Smooth Body (Non-Coilover) Internal Design: Monotube Collapsed Length (MM): 395.0 Lower Mount Type: Eye 14.1mm Body Diameter (ID): 46mm Collapsed Length (IN): 15.55 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