Although air suspension systems trace their roots back to show cars, Air Ride Technologies has proven that air suspensions can more than hold their own on a road course. Air is an excellent springing medium; it gets stiffer the more that it's compressed. Likewise, it can also be set up to behave in a very linear fashion. Unlike traditional coilovers, an air suspension can be adjusted at the touch of a button. These trick Shockwave units feature integrated double-adjustable shocks.