I used Firestone Ride-Rite air bags on my 2008 Superduty and was very happy with them. Even with the air bag, the 2008 stock leaf pack sagged too much and I had to add couple of leafs to gain an inch height. 2008 was the first year with longer springs so hopefully your year has improved springs. Years earlier I had Air Lift brand air bags on an F150 and they were fine although I lost an air line connection on rough road once. Since I have the camper on the Superduty full-time I ditched the helpers and went with custom rear leaf packs from local spring shop and wish I had done this at the beginning.