Air suspension systems can be divided into two basic categories: supplemental and replacement. Supplemental air springs, also known as “helper springs”, are designed to work with your existing coil or leaf springs, to level the vehicle and improve performance and driving safety when hauling cargo or towing. Replacement systems are installed in place of your existing suspension components to adjust ride height and ground clearance and allow suspension tuning to improve handling – the perfect set-up for show cars and performance driving.