JKS J-Kontrol 3.5" Lift Kit w/ Fox 2.5 Elite | 2007–2018 Jeep Wrangler JK 4-Door

JKS J-Kontrol 3.5" Lift Kit w/ Fox 2.5 Elite | 2007–2018 Jeep Wrangler JK 4-Door

Is This for You?

You're building a JK 4-Door Unlimited and you want 3.5" of lift with the J-Kontrol geometry correction and the top-spec Fox shock in the lineup. The JSPEC108PES delivers JKS J-Kontrol control arms with Fox 2.5 Elite DSC reservoir shocks — driver-adjustable compression, superior heat dissipation, and a refined trail feel on the JK Unlimited platform without the complexity of a long-arm conversion.

The Result

3.5" of lift with JKS J-Kontrol geometry correction. 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. Adjustable control arms allow precise alignment post-install. The JK 4-Door's longer wheelbase and heavier platform benefit from the DSC's ability to manage both slow-speed body pitch and high-speed impact harshness independently.

Verified Fitment (OFAS Standard)

• Fits: 2007–2018 Jeep Wrangler JK 4-Door Unlimited (Sport, Sahara, Rubicon)
• Does NOT fit: JK 2-Door | JL Wrangler (2018–2026) | Gladiator JT | Any JL variant
• Platform Note: JK production ended 2018. This kit does NOT apply to any 2019+ Wrangler.

System Specifications

• Lift Height: 3.5"
• System: J-Kontrol
• Shock: Fox 2.5 Elite w/ DSC (Dual Speed Compression) Reservoir
• Coil Rate: Tuned for JK 4-Door platform
• Control Arms: JKS J-Kontrol geometry-corrected control arms
• SKU: JSPEC108PES

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 skid plates and body panels. No cutting or welding required for standard JK 4-Door applications.

Wheel & Tire Fitment

Engineered for 35"–37" tires. Recommended backspacing: 4.5"–4.75" on a 17"×9" or 18"×9" wheel. Confirm fender clearance with specific tire brand and tread width before finalizing wheel selection.

Engineering Question

Running Fox 2.5 Elite DSC on a J-Kontrol 3.5" JK 4-Door Unlimited with a steel bumper and winch — how does the 4-Door's heavier accessory load affect the optimal DSC high-speed compression setting compared to a stock-weight JK 4-Door on the same terrain? A heavily loaded JK 4-Door generates higher peak shock velocities over sharp trail obstacles, which means the high-speed compression circuit needs more damping force to control body motion than on a stock-weight rig. Contact OFAS with your total front-end weight and primary terrain type and we'll give you a DSC baseline starting position calibrated for your specific JK 4-Door Unlimited build.