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: 00651860482026 Brand Name: Bilstein Extended Length (MM): 543.0 Collapsed Length (MM): 359.5 Finish: Zinc Plated Reservoir: No Body Diameter (ID): 46mm Upper Mount Type: Stem Body Design: Smooth Body (Non-Coilover) Lower Mount Type: Clevis Series: B8 5100 Adjustable Damping: Non-Adjustable Extended Length (IN): 21.38 Collapsed Length (IN): 14.15 Boot Included: Black Bellows Internal Design: Monotube Spring Seat Included: No 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