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: 00651860568911 Brand Name: Bilstein Extended Length (IN): 25.00 Body Diameter (ID): 46mm Body Design: Smooth Body (Non-Coilover) Upper Mount Type: Eye 14mm Extended Length (MM): 635.0 Collapsed Length (MM): 401.0 Adjustable Damping: Non-Adjustable Reservoir: No Series: B8 5100 Collapsed Length (IN): 15.79 Boot Included: Black Bellows Lower Mount Type: Eye 14mm Spring Seat Included: No Internal Design: Monotube Finish: Zinc Plated 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