The 2" Dodge Cummins pickup lift kit by Skyjacker includes Softride front & rear leaf springs with bushings & u-bolts. The factory block is removed. 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.