SENSEN 1710-FS Front Pair of Struts for 98-04 Audi A6 Precision designed for a direct fit and restore factory ride height. Nitrogen Gas charged, Twin-tube design Precision robotic welding for consistent, accurate quality and dependability Quality Control system certified by ISO9001:2000 and ISO/TS 16949:2446 SENSEN limited lifetime warranty, Purchase with confidence.