Strutmasters conversion kit is created as a direct replacement for a faulty air suspension, with no modifiers needed. The parts are quality and we stand behind our products so much, they come with a lifetime limited warranty. Don√¢¬Ä¬ôt mess with the dealer- it can be installed by your mechanic or by yourself. Detailed instructions, online installation videos, and tech support from ASE certified experts all help guide a smooth repair. This kit, made in America, comes complete with four struts assemblies with Eibach coil springs.