Quick Overview Bilstein B6 4600 (Shock Absorber Conversion Kit) are specifically designed to eliminate rear original equipment Nivomat load leveling shock absorbers. Removing the Nivomat damper causes a significant reduction in rear spring rate. The B6 4600 (Shock Conversion Kit) includes (2) springs which will restore factory ride height. The kit includes (2) B6 4600 monotube shock absorbers which will provide a significant improvement in ride quality, handling, and comfort. B6 4600 shock absorbers utilize a unique, velocity sensitive, digressive piston which reacts to changing road conditions. The B6 4600 (Shock Absorber Conversion Kit) will offer a performance replacement for an OE Nivomat suspension systems. Attributes: GTIN: 00651860805856 Brand Name: Bilstein Body Diameter (ID): 46mm Internal Design: Monotube Adjustable Damping: Non-Adjustable Finish: Yellow Paint Body Design: Smooth Body (Non-Coilover) Upper Mount Type: N/A Reservoir: No Boot Included: Blue Straight Series: B6 4600 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: 22.2500 x 27.3700 x 7.0000 inches Weight: 36.3100 lb PDF: USA SDS_Shock_Air Spring_V2_EN Generic_instructions_02