Retrue’s push-to-connect air fittings are extremely easy to use. Once the length of the air line has been selected to span the distance from the air springs to the inflation valves, simply use a sharp knife or tube cutter to cut the air line as squarely as possible (do NOT use side cutters or other devices that may smash the end of the air line). Then, push the air line into the fitting as far as possible.

After installing your air spring kit, make sure you have at least 1/2" of clearance around the entire air spring when inflated. A good rule of thumb is to use the thickness of your hand and feel around the entire air spring. If your hand comes in contact with anything on the vehicle, you may have an interference issue. If the object can be moved, relocate it. If the object cannot be moved, contact Firestone for further assistance. No part of the air spring kit (bellows, brackets, hardware) should rub on any lines (fuel, brake, electric) or contact anything but the mounting surfaces designed to support the brackets.

Make sure there is at least 6" of clearance between the air spring and the nearest heat source. Kits for vehicles with less than this clearance have a heat shield included. Our kits are designed to work around factory exhaust systems. Aftermarket systems with larger tubes may cause interference or put heat too close to the air spring, which will damage the rubber.

Never run the air spring under the minimum recommended pressure. Never exceed the maximum recommended pressure.