Rock Jock Pro Edition suspension lift kits deliver a smooth, comfortable on-road ride with the ultimate in off-road capability. Offered separately for JT and JL model Jeeps, these systems feature the full complement of Rock Jock's high-quality, durable suspension components—all in a complete, direct bolt-on kit. You'll be ready to take on the most extreme terrain with confidence!Most Pro Edition kits include:* 4 in. lift dual-rate front and rear springs* Urethane front coil spring isolators* 8 - Johnny Joint control arms* Johnny Joint front and rear trac bars* Front and rear antirock sway bar kits* Front and rear bump stops* All required hardware* Front brake line relocation brackets (JT kits only)* Extended rear brake hose kit (JT kits only)* Driveshaft carrier bearing drop spacer (JT kits only)