The 4" Dodge Cummins pickup lift kit by Skyjacker includes Softride front leaf springs with a rear block kit. The Softride leaf 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.
A pitman arm DA20 is required. If vehicle is equipped with a front sway bar, sway bar lowering kit SBL20 is required. Longer shocks are required also and are sold separately.