Named the "Monolinear", this Skyjacker Jeep Wrangler lift kit sports 6" mono leaf springs at all four corners, greaseable shackles front and rear, drop pitman arm, double disconnect sway bar links, re-designed track bar brackets and 40 durometer rubber bushings. Polyurethane can't touch this. Single Leaf springs equal zero friction. No friction means maximum flex and the Rock Ready shackles are industrial strength. These suspension lifts allow for maximum articulation & tire clearance for your Wrangler YJ. Front and rear stainless steel braided brake line are included in the YJ lift kit. Pitman arm, slip yoke eliminator, replacement CV driveshaft and longer shocks are required and ordered separately.