X-Factor Pro is the aluminum version of the X-Factor mid-arm design for the Wrangler JL (2-door), aimed at Sport and Sahara owners. All eight control arms are made from solid 7075 aluminum, and all the standard X-Factor benefits come built in.
That means the 95 degrees of misalignment, maintenance-free Adventure Series joints at the frame and Pro Krawler joints at the axle, in an all-aluminum arm set. The kit is complete and bolts in.
What's in the kit
The base kit, as Rock Krawler lists it:
- (2) front and (2) rear 7075 aluminum adjustable lower control arms
- (2) front and (2) rear 7075 aluminum adjustable upper control arms
- (4) triple-rate coil springs and (2) front, (2) rear spring pads
- (1) adjustable front track bar and (1) rear adjustable track bar
- (2) Gen-II sway bar links
- (2) adjustable rear sway bar links
- (1) bolt-on rear track bar relocation bracket
- Bump stops with every shock option (not included with the base system)
The coilover packages (Comp) swap in front shock towers and brackets, and keep two rear triple-rate coil springs with rear spring correction seats.
Why this system
- Solid 7075 aluminum arms. Eight of them, adjustable, uppers and lowers.
- 95 degrees of misalignment. Pro Krawler joints at the axle and Adventure Series joints at the frame cut factory arm bind.
- Tuning range. Adjustable arms let you set caster and pinion angle at both axles.
- Triple-rate coils. Rock Krawler says the on-road comfort beats the factory linear-rate springs.
- Axle centering. Front and rear track bar geometry corrections plus a bolt-on rear relocation bracket.
- Gen-II sway bar links. Included, with adjustable rear links.
Pick your package
The Package option sets the shocks.
- Base System (No Shocks). Kit only, for buyers who already have shocks picked out. Bump stops ship with every shock option; with no shocks they are sold separately (Rock Krawler lists them as RK07124). Generic shock lengths for the gas kits: front 18.31 inches collapsed and 30.31 extended, rear 19 collapsed and 31 extended.
- Bilstein 5100 Shocks. Maintenance-free shocks that Rock Krawler calls a great pairing with its multi-rate coil springs.
- Stage 1 Shocks (RRD 2.25 IFP). Rock Krawler's in-house shocks: a 2.25 inch hard anodized fluted aluminum body with the cooling surface area of a 2.5 inch shock, a 3/4 inch hard chrome stainless shaft and dual DU shaft bearings. Serviceable, rebuildable and revalveable.
- Comp Coilover Stage 1 and Stage 2. The Comp System runs 2 5/8 inch RRD racing coilovers with remote reservoirs up front and matching 2 5/8 inch RRD shocks with remote reservoirs in the rear, with coil springs still holding up the back, so it can still carry small loads or tow a small trailer. Stage 2 adds Fast CD (compression damping) adjusters. Rock Krawler lists 14.4 inches of front axle travel and 13.9 inches of rear axle travel.
Fitment and what else you'll need
- Fits 2018 and newer Jeep Wrangler JL 2-door models, Sport and Sahara (non-Rubicon), gas.
- Rock Krawler's tire guidance for Sport and Sahara models: 37 inch tires with full OEM fenders, or 38 inch tires with trimmed or high-lined fenders, at a 3 inch bump stop height with 3.5 inches of backspacing.
- Lift heights are based on a standard Rubicon build (front bumper and winch, rear bumper and full-size spare). Rock Krawler suggests dropping 1 inch of rear coil lift if you delete the spare, and going up 1 inch if you load the back for an overland-style build.
- A new front driveshaft is recommended if you wheel the Jeep routinely, and Rock Krawler recommends welding the rear cradle with 37 inch tires or larger.
- The coilover packages need fabrication: the listing calls for removing the factory shock mount on the frame and the shock and spring mount on the axle, and welding the new coilover mount to the axle.
Rock Krawler lists lifetime warranty coverage on the system itself, and its RRD shocks carry a separate 6 month warranty against defects in materials and workmanship.
