Engineered conversion kit replaces active suspension with dependable passive system. Arnott's Coil Spring Conversion Kit for your vehicle delivers a seamless, error free conversion of your vehicle air suspension system to steel coil springs. The Arnott kit features strut assemblies with coil springs made from American steel. The US designed and assembled kit also includes Arnott's patented (US Pat. No. 9,329,917) Electronic Bypass Module (EBM) to turn of dashboard suspension warning lights.