The Rough Country 4" N2.0 Series lift kit for the Jeep Wrangler TJ includes front & rear coil springs, front & rear lower tubular control arms, Clevite bushings, solid tubular transfer case drop kit, track bar drop bracket, sway bar links and four N2.0 Nitro shocks. Shock boots sold separately. The coil springs are based on OEM spring rates for a stock quality ride. Transfer case drop maintains proper driveshaft angles to avoid vibration. Control arms feature Clevite brand OEM style rubber bushings.