Bedlam wrote:
Firestone actually sells two models for most trucks. One model goes on top of the spring pack and the other replaces the bump stop. The latter one must used if you have a gooseneck or fifth wheel hitch to avoid interference. Other manufacturers usually choose one method or the other.
true but as far as I can tell only Airlift makes airbags with internal bumpers that allow you to use them at zero psi without damaging them. This is f benefit to me as I only need the leveling capability when towing the horse trailer. I sit level with just the TC on board and the leafs give me a great ride.