Rock Krawler 4.5 Inch X Factor Pro Aluminum Mid-Arm - Jeep Wrangler JK 2-Door

The 4.5 inch X Factor Pro is the full X Factor mid-arm package for the Jeep Wrangler JK 2-Door with every control arm made from solid 7075 aluminum. All eight arms come standard with the X Factor features, including 95 degrees of total misalignment with Pro-X Krawler joints at the axle and Adventure Series joints at the frame. It is a bolt-in system for owners who want an all-aluminum arm set.

Rock Krawler bases its lift heights on Rubicon models in a standard build, meaning a front bumper and winch, a rear bumper and a full-size spare.

What's in the kit

• 4 x triple-rate coil springs
• 2 x machined 7075 aluminum front adjustable lower control arms
• 2 x machined 7075 aluminum front adjustable upper control arms
• 1 x adjustable front track bar
• 1 x Pro-X top mount drag link
• 2 x quick disconnect front sway bar links
• 2 x machined 7075 aluminum rear adjustable lower control arms
• 2 x machined 7075 aluminum rear adjustable upper control arms
• 2 x rear spring pads
• 2 x adjustable rear sway bar links
• 1 x bolt-on rear track bar relocation bracket
• 1 x rear track bar
• 1 x front and rear extended brake line kit

Bump stops come with every shock package. On the base system they are not included, but they can be bought separately (RK07123).

Why this system

• All eight control arms are solid 7075 aluminum
• Everything that comes with the X Factor: 95 degrees of total misalignment, Adventure Series joints at the frame and Pro Krawler joints at the axle
• Adjustable arms to tune caster and pinion angle at both ends
• Triple-rate coils with spring correction pads and lean correction
• Front and rear track bar geometry corrections to center the axles
• Can be upgraded to a Rock Krawler long-arm system later

Pick your package

• Base System (No Shocks): the full kit with no shocks, for builds where you already have shocks picked out.
• Stage 1 (RRD 2.25 Inch IFP Shocks): Rock Krawler's in-house shock with a 2.25 inch O.D. hard anodized fluted aluminum body, a 3/4 inch 17-4 PH stainless steel hard chrome plated shaft, a billet aluminum valve circuit, dual DU shaft bearings and double redundant sealing. It is serviceable, rebuildable and revalveable.
• Stage 2 (RRD 2.25 Inch FCD Shocks): Everything in the IFP shock plus a Fast Compression Damping (FCD) adjuster, up to a 30 percent increase, so you can fine-tune ride quality and handling.

Rock Krawler's generic shock lengths for this system are front 18.5 inch collapsed and 29 inch maximum extended and rear 17.3 inch collapsed and 28.31 inch maximum extended, which is handy if you plan to shop for your own shocks.

Fitment and what else you'll need

Fits 2007-2018 Jeep Wrangler JK 2-Door models. Rock Krawler lists it for Sport, Sahara, Willys and Rubicon trim levels.

• If building with a spare delete we recommend dropping 1 inch in coil lift height for the rear.
• If building an overland or heavily up-fitted build in the back, we recommend upsizing 1 inch in coil lift height for the rear.
• We recommend a new front driveshaft if you plan to off-road routinely. (Adam's Driveshafts, Tom Woods, J.E. Reel)

Tire guidance from Rock Krawler: 33 or 35 inch tall tires with full OEM fenders, 37 inch tall tires with flat fenders. They typically recommend 4.5 inch of backspacing with 33 and 35 inch tires and 3.5 inch with 37 inch tires.

Rock Krawler backs this system with lifetime warranty coverage.