The Rock Krawler JL 4.5 X Factor Mid Arm System was designed for those who want a complete bolt-in installation, maximum articulation from a mid-arm kit and the durability and off-road performance you expect from Rock Krawler Suspension. The X Factor Series adjustable lower control arms offer a total of 90 degrees of misalignment that eliminates the bind found in your JL's factory lowers, while high misalignment adjustable upper control arms let you precision tune your JL's caster both front and rear. Rock Krawler's industry leading triple rate coils give you 4.5 inches of lift to clear up to 42-inch tires, depending on model, and improve the on-road ride over the factory linear rate springs. All Rock Krawler JL systems include correction pads that reduce the spring bow inherent in the factory set up. The provided track bar geometry corrections, both front and rear, lets you perfectly center the axles so there is no compromise in on road handling.
Tire Fitment:Sport and Sahara with Full OEM Fenders38in Tall Tires (4in Bump Stop Height Recommended)Sport and Sahara with Trimmed or High Lined OEM Fenders40in Tall Tires (4in Bump Stop Height Recommended)Rubicon with Full OEM Fenders39in/40in Tall Tires (4in Bump Stop Height Recommended)Rubicon with Trimmed or High Lined OEM Fenders42in Tall Tires (4in Bump Stop Height Recommended)
Wheel Fitment:Sport and Sahara Wheel Fitment Recommendations38in Tall Tires -Recommend 3.5in of BackspacingRubicon Fitment Recommendations39in Tall Tires Ð Recommend 4.0in of Backspacing42in Tall Tires Ð Recommend 3.5in of Backspacing
Shock Notes:Generic Front Shock Length Ð 18-19" Collapsed/ 31" Maximum ExtendedGeneric Rear Shock Length -19" Collapsed/ 32Ó Maximum Extended
General Notes:*Required Steersmarts XD Yeti HD Bottom Mount Drag Link for Hard Off Road Use*All lift heights based on Sport Models*Recommend a new front C.V. driveshaft for all front shocks with max. extended length greater than 29in*Requires welding of the Front and Rear Long Arm Mounts*Requires removal of the OEM frame side lower front and rear control arm mounts*Requires removal of the OEM frame side front upper control arm mounts*Recommend installing limiting straps to avoid over extension of suspension components after vehicle is all set up.