Arnott's new front air spring for the 2003-2006 Ford Expedition and Lincoln Navigator enables you to quickly and economically replace the leaking air spring portion of your front strut. The Arnott spring is manufactured with a new heavy-duty air spring bladder from ContiTech and includes a new seal kit. Each air spring is assembled and tested in the USA to ensure the highest standard of quality. Arnott's new air spring for the Expedition and Navigator is so heavy duty, that it is backed by a Limited Lifetime Warranty. NOTE: Arnott recommends changing the dryer when replacing air springs. Moisture in your system may damage the compressor.