I started off with Firestone airbags on my 2008 F350 right after I bought it and was disappointed. Not in the airbags themselves, but in the way the truck handled with airbags alone. Adding too much pressure to the airbags just kept the springs from reaching the overload leafs (leaves?). On any side-to-side movement of the truck and camper, it would repetitively bounce and roll like a sick pig. I added the Torklift bumper extensions to allow the springs to seat on the overload leaves (leafs?) and reduced the pressure on the bags to 30 lbs. That made all the difference in the ride quality and feeling. Now the truck rides level, it put a little more weight on the front springs and still have enough touch to the rear springs that it doesn’t feel like an overloaded Continental floating down the highway.