3.5" 2018-2026 Jeep Wrangler JL Diesel / 392 (4 Door) J-Krawl Lift Kit by JKS

The JKS J-Krawl 3.5" suspension lift kit for Diesel 4-Door Jeep Wrangler JL models is engineered as a hardcore rock-crawling solution focused on maximum articulation, strength, and full suspension adjustability. Designed to build off factory suspension mounting points, this system upgrades critical components front to rear to create a trail-dominant platform capable of handling oversized tires, extreme terrain, and demanding off-road use.

At the core of the J-Krawl system is a complete set of adjustable J-Flex or J-Link upper and lower control arms. These high-strength control arms dramatically improve durability while allowing precise adjustment of front caster, rear pinion angle, and overall wheelbase—key elements for dialing in suspension geometry on lifted diesel JL builds. Control arm bushing options include factory-style rubber bushings for reduced noise, vibration, and harshness, or Flex Ends that provide increased articulation, serviceability, and trail-focused performance.

Matched JSPEC dual-rate front and rear coil springs are tuned to deliver controlled on-road ride quality while providing exceptional stability, traction, and flex during aggressive off-road driving. Optional heavy-duty coil springs are available to support added weight from armor, winches, roof racks, and other accessories. An adjustable front track bar and rear track bar bracket ensure proper axle centering, while front sway bar Quicker Disconnects, rear sway bar links, and front and rear bump stop extensions manage articulation and protect suspension components throughout the full range of travel.

The JKS J-Krawl 3.5" suspension system is available with a wide range of custom-valved FOX shock options tailored to different driving styles and terrain demands, including FOX 2.0 Adventure Series, FOX 2.0 Performance Series, FOX 2.5 Performance Series, FOX 2.5 Performance Elite Series, and FOX 3.0 Factory Race Series shocks. JKS engineers spent extensive time dialing in shock valving and spring rates to suit the J-Krawl system and oversized wheel-and-tire combinations, delivering impressive stability and controlled compression and rebound. Due to the increased potential for suspension travel, an aftermarket front driveshaft is strongly recommended.

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