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

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

Is This for You?

You're running a stock-weight JL 4-Door Unlimited — no heavy steel bumpers, no winch — and you want 3.5" of lift with the J-Kontrol geometry correction and Fox 2.5 reservoir damping. The JSPEC141PS delivers JKS J-Kontrol control arms with Fox 2.5 Performance Series reservoir shocks and standard-rate coil springs. Standard-rate coils maximize droop travel and trail compliance for stock-weight builds, 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. Standard-rate coils deliver a softer initial spring feel and greater droop travel compared to HD coils — maximizing articulation for stock-weight builds. Fox 2.5 reservoir shocks deliver consistent damping and heat dissipation on extended trail runs. Adjustable control arms allow precise alignment post-install.

Verified Fitment (OFAS Standard)

• Fits: 2018–2026 Jeep Wrangler JL 4-Door (Unlimited) — Gas Models (2.0T, 3.6L), Stock-Weight Configuration
• Does NOT fit: JL 2-Door | JL EcoDiesel | JL 4xe Hybrid | JK (any year) | Gladiator JT
• Coil Note: Standard-Rate — NOT recommended for builds with steel bumpers, winch, or heavy roof rack. Use JSPEC142PS (HD coils) for accessorized builds.

System Specifications

• Lift Height: 3.5"
• System: J-Kontrol
• Shock: Fox 2.5 Performance Series w/ Reservoir
• Coil Rate: Standard-Rate — optimized for stock-weight JL 4-Door builds
• Control Arms: JKS J-Kontrol geometry-corrected control arms
• SKU: JSPEC141PS

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

Optimized for 35" tires on a stock-weight build. Recommended backspacing: 4.5"–4.75" on a 17"×9" or 18"×9" wheel. Standard-rate coils are not recommended for tire sizes exceeding 37" without load confirmation from OFAS.

Engineering Question

Comparing the J-Kontrol 3.5" standard-rate on a stock-weight JL 4-Door versus the J-Konnect 3.5" standard-rate on the same platform — both run Fox 2.5 reservoir shocks and standard-rate coils, so what's the practical geometry difference between the two systems at this lift height? 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 stock-weight JL 4-Door that sees moderate trails and daily driving, 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.