Rock Krawler 4.5in X Factor Suspension System

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.

System Benefits:

Tire Fitment:
Sport and Sahara with Full OEM Fenders
38in Tall Tires (4in Bump Stop Height Recommended)
Sport and Sahara with Trimmed or High Lined OEM Fenders
40in Tall Tires (4in Bump Stop Height Recommended)
Rubicon with Full OEM Fenders
39in/40in Tall Tires (4in Bump Stop Height Recommended)
Rubicon with Trimmed or High Lined OEM Fenders
42in Tall Tires (4in Bump Stop Height Recommended)

Wheel Fitment:
Sport and Sahara Wheel Fitment Recommendations
38in Tall Tires - Recommend 3.5in of Backspacing
Rubicon Fitment Recommendations
39in Tall Tires Ð Recommend 4.0in of Backspacing
42in Tall Tires Ð Recommend 3.5in of Backspacing

General Notes:

*Required Steersmarts XD Yeti HD Bottom Mount Drag Link for Hard Off Road Use

*All lift heights based on Sport Models For 2 Doors for standard style build (i.e., front bumper and winch, rear bumper and full-size spare).

*If building with a spare delete, we recommend dropping 1” in coil lift height for the rear.

*If building an overland or heavily upfitted build in the back, we recommend upsizing 1” in coil lift height for the rear.

*Recommend a new front C.V. driveshaft for all front shocks with max. extended length greater than 29”

*Recommend installing limiting straps to avoid over extension of suspension components after vehicle is all set up.