JKS J-Konnect 3.5" Lift Kit w/ Fox 2.0 Performance | 2007–2018 Jeep Wrangler JK 4-Door

JKS J-Konnect 3.5" Lift Kit w/ Fox 2.0 Performance | 2007–2018 Jeep Wrangler JK 4-Door

Is This for You?

You're building a JK 4-Door Unlimited and you want the J-Konnect long-arm geometry upgrade with proven Fox damping at a value-forward price point. The JSPEC113KFP pairs JKS long-arm control arms with Fox 2.0 Performance Series shocks — a significant upgrade over factory damping that delivers consistent, predictable performance for moderate trail use and daily driving on the JK Unlimited platform.

The Result

3.5" of lift with JKS long-arm caster and pinion correction. Fox 2.0 Performance shocks deliver reliable, consistent damping for moderate trail use and daily driving. Adjustable upper and lower control arms allow precise alignment post-install. Axle wrap is eliminated and the JK 4-Door's longer wheelbase delivers a composed, planted ride at highway speeds with this geometry correction in place.

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-Konnect Long-Arm
• Shock: Fox 2.0 Performance Series (non-reservoir)
• Coil Rate: Tuned for JK 4-Door platform
• Control Arms: JKS adjustable upper and lower long-arm (front and rear)
• SKU: JSPEC113KFP

Installation & Fabrication Notes

Long-arm geometry requires a front differential drop or relocation bracket (included or specified in kit). Professional 4-wheel alignment required post-installation. Torque all control arm hardware to JKS specification after a 500-mile break-in. No cutting or welding required for standard JK 4-Door applications. For extended technical trail use or heavily accessorized builds, consider upgrading to the Fox 2.5 Elite variant (JSPEC113PES) for improved heat management and DSC adjustment.

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 2.0 non-reservoir shocks on a J-Konnect 3.5" long-arm JK 4-Door Unlimited with a steel bumper and winch — how does the 4-Door's heavier curb weight and accessory load affect the 2.0 Performance's thermal ceiling compared to a stock-weight JK 2-Door at the same lift height? The 4-Door's additional mass increases the dynamic load per compression cycle, which reduces the 2.0's thermal headroom on sustained technical terrain. For moderate trail days on a lightly accessorized JK 4-Door, the 2.0 Performance is adequate. Add a full steel front end and the math changes. Contact OFAS with your build weight and trail profile and we'll confirm whether the Fox 2.5 Elite step-up is warranted for your specific JK 4-Door configuration.