I got the Super Springs on my 05 1500 WT 2 wheel drive. They only work when the truck is under a load. It does not change the suspension under normal loads. The springs have roller shackles and only work under a load. I pull a 16' flatbed loaded with scaffold and boards, and it is a load. I am real satisfied with the springs and there is no sag under a load. Good product. I didn't put the airbags or boots? because the truck didn't need them.