This exclusive Arnott-designed rear shock SK-2805 for the Audi all road and A6 (C5 Chassis) delivers excellent control, stability, performance and comfort. This twin-tube shock fits both the left and right sides and includes an actuator and three Voss Air Line Fittings for connecting to the air spring. Arnott's exclusive design adapts the shock to the original OEM Audi air spring and Arnott's aftermarket air springs. Arnott recommends replacing these shocks in pairs.