This new coil spring conversion kit, exclusively designed for the Lincoln Navigator or Ford Expedition, converts all four air struts on the vehicle to a more reliable coil spring/strut combination. The springs are designed to maintain the factory-intended trim height of your vehicle. To maximize efficiency and safety, Arnott's coil spring struts are preassembled and ready for easy installation, eliminating the need for the use of a dangerous spring compressor. No special tools are required. _x000D__x000D_NOTE: This conversion kit does not come with an Arnott electronic bypass module (EBM) to disable suspension warning lights.