Rock Krawler 3.5 Inch Ultimate Adventure Mid Arm System - 2018+ Wrangler JLU 392

The Ultimate Adventure No Limits is the mid arm kit for the Wrangler JLU 392, and it keeps the install bolt-in. It uses a set of service-free Adventure Series control arms, four non-adjustable lowers and four fully adjustable uppers, and adds a front No Limits sway bar kit built to work with the factory electronic sway bar disconnect on the Rubicon 392.

What's in the kit

• (4) Triple-rate coil springs
• (1) Front No Limits sway bar kit
• (2) Front and (2) rear set-length lower control arms
• (2) Front and (2) rear adjustable control arms
• (2) Front spring pads
• (1) Adjustable rear track bar
• (1) Adjustable front track bar
• (2) Rear spring pads
• (2) Set-length rear sway bar links
• (1) Bolt-on rear track bar relocation bracket

Shocks depend on the package you pick below. Bump stops come with every shock option; if you go with no shocks they can be ordered separately (Rock Krawler part RK07124).

Why this system

• Complete bolt-in system, so no cutting or welding to get it on the Jeep.
• Tuned triple-rate coil springs with spring correction pads give excellent highway ride and built-in lean correction.
• Track bar geometry corrections front and rear, plus an improved rear roll center, keep the axles centered and the handling honest.
• The Jeep sits level on all four corners.
• Service-free Adventure Series joints in the control arms and about 70 degrees of misalignment when paired with Adventure joints at the frame and axle.
• Upgradable to a Rock Krawler long arm system.
• No Limits: front sway bar links made for the factory electronic sway bar disconnect on Rubicon models, with factory-size hardware, a CNC-machined billet aluminum center section and Made in USA heim joints from FK Bearing. Install them, press the button and hit the rocks.
• Lifetime warranty coverage.

Pick your package

• Base System (No Shocks). The kit as listed above with no shocks, for the builder who already has shocks picked out. Bump stops come with every shock option; with this one they're ordered separately.
• Bilstein 5100 Shocks. The kit plus Bilstein 5100 shocks. Rock Krawler calls them maintenance free and a great pairing with its multi-rate coil springs.
• Stage 1 (RRD 2.25 inch IFP shocks). Rock Krawler's in-house shock: a 2.25 inch hard anodized fluted aluminum body with the cooling surface of a 2.5 inch shock, a 3/4 inch hard chrome stainless steel shaft, billet aluminum valving and dual DU shaft bearings. Serviceable, rebuildable and revalveable.

Fitment and what else you'll need

Fits the Jeep Wrangler JLU 392 (4-door): 392 models with the 6.4L Hemi V8.

Rock Krawler bases all lift heights on Rubicon models in a standard build (front bumper and winch, rear bumper and full-size spare). If you delete the spare, drop 1 inch of rear coil lift height; for an overland or heavily loaded rear build, go up 1 inch.

• Sport and Sahara: for 37 and 38 inch tall tires, Rock Krawler recommends 3.5 inches of backspacing. With full OEM fenders that means 37 inch tires; with trimmed or high-lined fenders, 38 inch tires (3 inch bump stop height recommended).
• Rubicon: 37 inch tall tires want 4.5 inches of backspacing and 40 inch tall tires want 3.5 inches. With full OEM fenders, 37 or 38 inch tires fit; with trimmed or high-lined fenders, 40 inch tires fit (3 inch bump stop height recommended).
• Rock Krawler recommends a new front driveshaft if you plan to off-road routinely.

Rock Krawler lists lifetime warranty coverage on this system. Posted lead times from Rock Krawler, in business days from order: mid arm kits 1 to 2 weeks, long arm kits 3 to 4 weeks, 2.25 inch shocks 1 to 2 weeks and 2.625 inch shocks or coilovers 3 to 4 weeks.