JKS J-Kontrol 3.5" Lift Kit w/ Fox 2.5 Elite | 2020–2024 Jeep Wrangler JL 4-Door EcoDiesel

JKS J-Kontrol 3.5" Lift Kit w/ Fox 2.5 Elite | 2020–2024 Jeep Wrangler JL 4-Door EcoDiesel

Is This for You?

You're running a JL 4-Door EcoDiesel and you want 3.5" of lift with the top-spec Fox shock in the J-Kontrol lineup. The JSPEC160PES delivers JKS J-Kontrol geometry-corrected control arms with Fox 2.5 Elite DSC reservoir shocks, engineered specifically for the EcoDiesel's heavier front end. The 3.0L V6 diesel adds significant mass over the front axle compared to the gas JL — this kit's coil rate and geometry correction account for that weight. Driver-adjustable compression lets you tune the ride on the fly between trail and highway.

The Result

3.5" of lift with JKS J-Kontrol geometry correction calibrated for the EcoDiesel's front-end weight. Fox 2.5 Elite DSC shocks give you on-the-fly compression adjustment — open it up for trail compliance, firm it up for highway stability under diesel torque loads. Adjustable control arms allow precise alignment post-install. The EcoDiesel's heavier front end benefits significantly from the DSC's ability to manage both slow-speed body pitch and high-speed impact harshness independently.

Verified Fitment (OFAS Standard)

• Fits: 2020–2024 Jeep Wrangler JL 4-Door (Unlimited) — 3.0L EcoDiesel ONLY
• Does NOT fit: JL Gas Models (2.0T, 3.6L) | JL 4xe Hybrid | JL 2-Door | 2025–2026 JL (EcoDiesel not offered) | JK (any year)
• Engine Note: EcoDiesel was available in the JL 4-Door from 2020–2024 only. Confirm your engine code before ordering.

System Specifications

• Lift Height: 3.5"
• System: J-Kontrol (EcoDiesel-specific coil rate)
• Shock: Fox 2.5 Elite w/ DSC (Dual Speed Compression) Reservoir
• Coil Rate: Heavy-duty — engineered for EcoDiesel front-end mass
• Control Arms: JKS J-Kontrol geometry-corrected control arms
• SKU: JSPEC160PES

Installation & Fabrication Notes

Professional 4-wheel alignment required post-installation. Torque all control arm hardware to JKS specification after a 500-mile break-in. Confirm DSC adjuster knob placement for driver accessibility during install. Verify Fox 2.5 reservoir clearance against diesel-specific skid plates and underbody components. No cutting or welding required for standard JL 4-Door EcoDiesel applications.

Wheel & Tire Fitment

Engineered for 35"–37" tires. Recommended backspacing: 4.5"–4.75" on a 17"×9" or 18"×9" wheel. The EcoDiesel's heavier front end affects fender clearance differently than the gas JL — confirm tire brand and tread width before finalizing wheel selection.

Engineering Question

Running Fox 2.5 Elite DSC on a J-Kontrol 3.5" EcoDiesel JL 4-Door — how does the 3.0L diesel's additional front-end mass affect the optimal DSC high-speed compression baseline compared to the same shock on a gas JL 4-Door at the same lift height? The EcoDiesel's heavier front end generates higher peak shock loads over trail obstacles, which means the DSC high-speed circuit needs more damping force to control body motion than on a gas JL. A DSC setting dialed for a gas JL will typically feel too soft on the EcoDiesel under the same terrain. Contact OFAS with your accessory weight and primary terrain and we'll give you a DSC starting position calibrated specifically for the EcoDiesel's front-end dynamics at 3.5" of lift.