Firestone's Ride-Rite Extreme Duty Air Spring Kits are built to extreme specifications for the most demanding applications, giving the added support your suspension system needs when hauling slide out campers, horse trailers, boats or heavy truck bed loads. These air spring kits feature stronger brackets with nuts and bolts, commercial grade rubber, and handles levels up to 7500 lbs. The 150 PSI operating pressure is class leading and delivers reliable, safer and quality towing. Available for Ford, GM and Dodge applications.