The 4" Dodge Cummins pickup lift kit by Skyjacker includes Softride front leaf springs with a set of rear add-a-leafs. The Softride springs manufactured by Skyjacker use tapered leaves to yield a lower spring rate and better travel, Teflon wear pads to help reduce interleaf friction, a "bolt" style clip to reduce leaf friction and shotpeening to compress the steel and increase its tensile strength.
Steering correction is required. Skyjacker recommends a pitman arm. If vehicle is equipped with a front sway bar, sway bar lowering kit is required. Longer shocks are required.