Firestone Ride-Rite rear air helper spring kit for Ford F550 and Ram 4500/5500 is designed to increase load-carrying capacity and stabilize ride quality under heavy loads. The kit uses adjustable air pressure to help level the vehicle, improve braking and reduce suspension fatigue. It includes brackets, air helper springs, hardware, air line and inflation valves; installation specifics vary by application and some kits require drilling.
Firestone Ride-Rite Air Helper Spring Kit Rear Ford F550 / Ram 4500/5500 (W217602404)