This new coil spring conversion kit was exclusively designed for the Lincoln Navigator and Ford Expedition. The conversion kit converts the air suspension on the rear of these luxury SUV to a more reliable coil spring/strut combination. These aftermarket springs are designed to maintain the factory-intended trim height. This kit features the highest-quality replacement components including powder-coated US-made steel coil springs and custom-tuned shocks. To maximize efficiency and safety, Arnott's coil spring kit is preassembled and ready for easy installation, eliminating the need for the use of a dangerous spring compressor. No special tools are required. This air-to-steel spring suspension kit also includes Arnott's new patents pending Electronic Bypass Module (EBM) technology to reliably eliminate dash panel suspension related fault codes. This pioneering technology, exclusively from Arnott, easily connects directly to your Lincoln or Ford electronics in a matter of minutes. Not compatible with longer wheelbase Navigator L or Expedition EL Models Features: Reliable Coil Spring Suspension Includes All Hardware Restores Vehicle's Factory Ride Height Includes EBM to turn off Warning Lights Detailed Installation Manual Available Pre-Assembled For Trouble-Free Installation