Rock Krawler JK 3.5 Inch X Factor Mid Arm liftNotes: We typically recommend 4.5 inches of back spacing on rims for 33 and 35 inch tall tires.We typically recommend 3.5 inches of back spacing on rims for 37 inch tall tires.For 2012 and newer models an aftermarket front driveshaft with 2 inch O.D. steel tubing is recommended, but not requiredThe X Factor System allows the rear axle to be pushed back up to 1 inch over stock which perfectly centers the rear axle assembly under typical aftermarket flat fenders. It also allows for larger tires without contacting the rock sliders or rear pinch seam.
