JKS J-Kontrol 3.5" Lift Kit w/ Fox 2.5 | HD Coils | 2018–2026 Jeep Wrangler JL 4-Door

JKS J-Kontrol 3.5" Lift Kit w/ Fox 2.5 | HD Coils | 2018–2026 Jeep Wrangler JL 4-Door

Is This for You?

You're building an accessorized JL 4-Door Unlimited — steel bumper, winch, or heavy spare — and you want 3.5" of lift with the J-Kontrol geometry correction and Fox 2.5 reservoir damping. The JSPEC142PS delivers JKS J-Kontrol control arms with Fox 2.5 Performance Series reservoir shocks and HD coil springs. HD coils handle the weight of a built rig without sagging, and the J-Kontrol's geometry correction delivers improved caster and pinion angle without the complexity of a long-arm conversion.

The Result

3.5" of lift with JKS J-Kontrol geometry correction. HD coils maintain ride height under accessory loads. Fox 2.5 reservoir shocks deliver consistent damping and heat dissipation on extended trail runs. Adjustable control arms allow precise alignment post-install. The J-Kontrol's install simplicity is a meaningful advantage on the JL 4-Door platform compared to a full long-arm conversion.

Verified Fitment (OFAS Standard)

• Fits: 2018–2026 Jeep Wrangler JL 4-Door (Unlimited) — Gas Models (2.0T, 3.6L)
• Does NOT fit: JL 2-Door | JL EcoDiesel | JL 4xe Hybrid | JK (any year) | Gladiator JT
• Coil Note: HD Rate — engineered for accessorized JL 4-Door builds with steel bumpers or winch. Use JSPEC141PS (Std-Rate) for stock-weight builds.

System Specifications

• Lift Height: 3.5"
• System: J-Kontrol
• Shock: Fox 2.5 Performance Series w/ Reservoir
• Coil Rate: HD — tuned for accessorized JL 4-Door builds
• Control Arms: JKS J-Kontrol geometry-corrected control arms
• SKU: JSPEC142PS

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 Fox 2.5 reservoir clearance against skid plates and body panels. No cutting or welding required for standard JL 4-Door gas applications.

Wheel & Tire Fitment

Engineered for 35"–37" tires on an accessorized build. 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

Choosing between the J-Kontrol 3.5" and J-Konnect 3.5" for an accessorized JL 4-Door build with Fox 2.5 reservoir shocks and HD coils — both deliver geometry correction at 3.5" of lift, so what's the practical difference in trail performance and install complexity? The J-Konnect's long-arm geometry delivers superior caster correction and articulation, but requires a differential drop and more complex install. The J-Kontrol corrects geometry without the long-arm conversion complexity. For a JL 4-Door that sees moderate trails and daily driving with a full accessory load, the J-Kontrol is a capable, clean solution. Contact OFAS with your trail intensity and build goals and we'll confirm which system is the right fit for your specific JL 4-Door build.