Air suspension is used in place of conventional steel springs in heavy vehicle applications such as buses and trucks, and in some passenger cars. It is widely used on semi trailers and trains (primarily passenger trains). The purpose of air suspension is to provide a smooth, constant ride quality, but in some cases is used for sports suspension. Modern electronically controlled systems in automobiles and light trucks almost always feature self-leveling along with raising and lowering functions.
Maxpeedingrodsus.com provides excellent quality Air Suspensions which compatible for Audi, compatible for BMW, compatible for Ford, compatible for Nissan and other tuning car parts.