The RockJock® JK 4" Standard Off Road Suspension System for any model of the 2-door Jeep JK Wrangler is a cost effective alternative to our full kit. This kit includes 4 lift front and rear coil springs, front and rear upper Johnny Joint® upper control arms, front and rear bump stop kits, front and rear trac bar relocation bracket kits, adjustable rear sway bar links, dropped pitman arm, and front and rear brake hose relocation brackets. All necessary hardware and detailed installation instructions included. This kit will allow for the efficient clearance of 37" tires! Uses RT-999329, and RT-999330 Rancho shocks (not included). NOTE: Kit is designed to use an 9 1/2" travel shock. 2012 & newer models will most likely require exhaust modifcations to allow for suspension down travel.