The 4" X-Series lift kit for the Jeep Wrangler JK by Rough Country includes front & rear coil springs, front & rear upper and lower adjustable control arms with X-Flex joints, front forged adjustable track bar, rear track bar bracket, front sway bar quick disconnects, rear sway bar links, rear coil correction plates, front & rear stainless steel brake lines and four N2.2 Performance shocks.
The X-Flex control arms include Clevite OEM style rubber bushings, flex joints with 2.5" diameter body and huge 1.25" threads that are adjustable from stock up to 6" of lift. All joints are greasable and fully rebuildable. Upper joints pivot up to 20 degrees, Lower joints pivot up to 35 degrees. Coil correction plates correct the rear coil angle 10 degrees and allows the rear coil spring to function more efficiently.
The included front forged adjustable track bar has the added feature of being able to adjust and re-center the axles while installed on the Jeep. If you're a serious off-roader concerned with flexing, crawling and pushing the limits, this massive 16 lb track bar (nearly twice the weight of the JK factory track bar) is constructed of forged steel with rubber Clevite bushings and will provide unparalleled support to your Jeep. Installation is simple and adjustment is so easy. While others offer adjustable track bars, the Rough Country track bar is fully adjustable while on the vehicle - a significant improvement. Simply attach to the vehicle and dial in using the Rough Country innovative clamp and sleeve system.
On Automatic equipped vehicles; due to use of an oversize driveshaft from the factory and inadequate factory clearance it may be possible for the front driveshaft to come in contact with the automatic transmission pan tearing the factory boot and rubbing on the shaft. Generally this occurs during heavy articulation when front sway bar links are disconnected and longer shocks are installed. If this is found to occur, the proper procedure would be to replace the oversize factory shaft with an aftermarket smaller diameter shaft to increase clearance between the transmission and front driveshaft. Rough Country does offer these replacement driveshafts.