they only drop them about ~1", the Ironman drop them~ 3", If you lift the truck ~3" then the arms need to be lowered the same amount to maintain geometry. The fulcrum needs to swing at the same arc. If you do not drop the arms it still has to go up more before it swings back. The drop...
I have installed multiple sets. They fit well, align front lower arms to factory specs and help with caster issues that bushings will not take care of. They also push the front axle forward to help with clearance issues. Other style bolt on mounts attach to the crossmember bolts and have to...