Firestone Ride-Rite air helper springs are designed to improve ride and handling, increase traction, and reduce suspension fatigue. Ride-Rites are equipped with individual inflation valves, so you can level your vehicle front-to-rear or side-to-side when you are carrying off-center loads. They can boost your load-carrying capacity from 3,200 to 5,000 lbs. per set. These heavy-duty, convoluted air springs mount between the suspension and frame of your vehicle, some drilling may be required on certain models. For big-time help for your vehicle's suspension install Firestone Ride-Rite air helper spring kits--and feel the difference.