Ford designed and released these popular mid-size 4x4 vehicles using hteir twin I-beam front suspension - of twin tration beam (TTB) as Ford likes to call it. The difficulty with this deisgn is that you raise the front of the vehicle the tops of the front tires lean outward creating posiive camber angle. Due to the inconsisent factory height on these vehicles and very sensitive alignment tolerances, it is nearly impossible to properly align these twin i-beam vehicles once the have been lifted. Of course we have overcome this problem by including adjustable cam bolts and brackets in our complete packages. (Note: our 4" and 6" premium packages, and all of our 8" packages, are not cam bolt designed)