Arnott's completely assembled and ready-to-install front air strut fits both the left and right side of the 1998-2004 Audi A6 and 1999-2005 Audi A6 allroad quattro (C5 Chassis). This complete replacement strut is assembled with a custom-valved twin-tube shock absorber and Arnott's heavy-duty Generation-I air spring featuring an air bladder manufactured by ContiTech and machined aluminum bottom mount. This front air strut provides excellent control and performance, supports the vehicle's auto-leveling functionality and offers a faster installation. Each front strut is fully assembled and tested in the USA to ensure the highest standard of quality. Arnott recommends replacing these struts in pairs.