ST Suspension 90605 Coilover Kit for Audi A4 (8E/B6-B7) Sedan Quattro and Convertible, (Set of 4) Matched damper and spring rates Lowers the vehicle by 1.0 inch - 2.5 inches; height adjustable in all four corners Corrosion resistant zinc plated threaded strut housing Integrated rising rate elastomeric bump stops