Your vehicle’s suspension is the system of parts that connects the frame to the wheels, thus isolating it from the road, allowing for relative motion. In addition to supporting the full weight of your vehicle, suspension systems affect stance, ride height, handling, and ride quality.
In vehicles with a factory coilover suspension, part of this system is a steel coil spring that goes over the shock or strut. In an air suspension system, the coil is upgraded to an enclosed flexible rubber membrane, known as an air spring. These air springs can then be inflated and deflated at the touch of a button, allowing for instant adjustability to tune in the qualities mentioned above.
-Air Lift Performance