Ford Expedition 03-06, Coil Spring Conversion Kit (C-2140) by Arnott, Comes In Two Boxes. Includes: Springs, Struts, Mounts, Quick Struts, Installation Instructions. Arnott has revolutionized the industry once again with our exclusive conversion kit. Elite coil spring kit delivers a seamless and error-free conversion of your vichicle suspension system. You can finally enjoy your car without worrying about failing air suspension parts, leaving you stranded with expensive and recurring maintenance problems.