This kit includes 2 components, each built and powder-coated in-house.
Transform Your Jeep’s Suspension for Maximum Off-Road Dominance
Take your 2018-Present Jeep Wrangler JL to the next level with the CORE 4X4 JL Long Arm Kit (J-JL-C-LAK8)—a massive suspension upgrade that enhances articulation, ride quality, axle stability, and durability. This weld-on kit completely redefines your Jeep’s suspension geometry, delivering a longer arc of travel for smoother suspension movement, better traction, and unmatched off-road capability.
Designed for serious off-roaders, this kit features massively upgraded bracketry, extended-length control arms, and industry-leading materials for a stronger, more controlled, and more capable suspension system. Whether you're conquering extreme rock crawls, desert trails, or rugged terrain, this long arm kit provides unparalleled handling and durability.
Key Features and Benefits
- Optimized Suspension Travel Geometry Optimization – Extends control arm mounting points for a longer arc of suspension travel, providing a smoother ride, better flex, and superior traction across all terrains. Reduces axle steer and bump steer, improving both high-speed stability and low-speed crawling performance.
- Ultra-Strong 7075 Aluminum Control Arms with ‘Memory’ – Constructed from massive 2-inch and 1.5-inch 7075 aluminum, these control arms flex under impact and return to their original shape rather than permanently bending—ensuring consistent suspension geometry and long-term reliability.
- Precision-Welded 3/16” Steel Brackets for Maximum Durability – Laser-cut and precision-bent brackets eliminate flex and provide rock-solid stability. The rear frame brackets integrate body mount relocation, eliminating interference issues while reinforcing your Jeep’s structure.
- Full-Width Axle Compatibility Steel Arm Option – Recommended for full-width axles with 7075 aluminum control arms. A steel control arm option with optimized bends is available for those retaining factory-sized axles.
- Weld-On Installation for a Permanent Performance Upgrade – Requires cutting and welding for installation, ensuring a permanent and incredibly strong suspension system. Professional installation is recommended.
Durable Powder Coating for Long-Lasting Protection
To maximize durability and corrosion resistance, all control arms undergo a two-stage powder coating process. The zinc primer base coat provides a strong foundation, protecting against rust and wear. The durable top coat, available in 10 color options, adds an extra layer of resilience while allowing you to customize your Jeep’s look. Brackets come in raw steel to ensure proper welding and post-installation finishing.
Proudly Made in the USA
Designed and manufactured in Orem, UT, using only the highest quality American-sourced materials. Strict quality control, rigorous testing, and precision engineering ensure every component is built to handle the toughest off-road conditions. By choosing CORE 4X4, you’re supporting American manufacturing and getting an unmatched product that delivers lasting performance.
Final Thoughts
The CORE 4X4 JL Long Arm Kit (J-JL-C-LAK8) is the ultimate suspension upgrade for Jeep Wrangler JL owners looking to push their off-road performance to new heights. With extended-length control arms, precision-engineered bracketry, and 7075 aluminum’s impact-resistant memory, this kit delivers maximum articulation, axle stability, and durability.
Upgrade your Jeep Wrangler JL today with the CORE 4X4 Long Arm Kit and experience next-level suspension performance and ride quality—on the trail and the road!
Vehicle Fitment: Jeep Wrangler JL 18+ – This suspension upgrade enhances suspension travel, articulation, and axle stability, delivering improved ride quality, traction, and durability across extreme off-road conditions.
CORE Advantage: The extended control arm design optimizes suspension geometry, creating a longer arc of suspension travel for better flex and smoother ride quality. This reduces axle steer and bump steer, improving both high-speed stability and low-speed crawling.
Adjustability: On-vehicle adjustability allows for precise tuning of caster, pinion angles, and axle alignment to ensure perfect suspension geometry for lifts from 0 to 6 inches. It also ensures proper fitment for various tire sizes, preventing rubbing and improving clearance.
Construction: Crafted from 7075 aluminum (2" OD for lower arms, 1.5" OD for upper arms), these control arms offer a perfect balance of lightweight strength and flexibility. The material's ‘memory’ ensures the arms return to their original shape after impact, maintaining suspension geometry.
Two-Stage Powder Coating: Zinc primer base and top coat available in 10 vibrant colors protect against corrosion and allow for personalized styling of your rig.
Warranty and Origin: Proudly manufactured in the United States, our product includes a lifetime warranty on all non-wear items, providing you with confidence and peace of mind in your purchase.
Built With
Front Lower Control Arms Built With 2” 7075 Aluminum. Forged Johnny Joints on both adjustable ends with 1.25” x 12 TPI - 2.32” long threads.
Front Upper Control Arms Built With 1.5” 7075 Aluminum. Forged Johnny Joint on the adjustable end with an adjustable U-bracket on the other adjustable end with 1” x 14 TPI - 3.25” long threads.
Rear Lower Control Arms Built With 2” 7075 Aluminum. Forged Johnny Joints on both adjustable ends with 1.25” x 12 TPI - 2.32” long threads.
Rear Upper Control Arms Built With 1.5” 7075 Aluminum. Forged Johnny Joints on both adjustable ends with 1” x 14 TPI - 3.25” long threads.
| Make | Model | Submodel | Years |
|---|---|---|---|
| Jeep | Wrangler | 2018 - Present |
Each rebuild kit includes all necessary components to replace and restore wearable parts.
Construction & Materials
Front Lower Control Arms Built With 2” 7075 Aluminum. Forged Johnny Joints on both adjustable ends with 1.25” x 12 TPI - 2.32” long threads.
Front Upper Control Arms Built With 1.5” 7075” Aluminum. Forged Johnny Joint on the adjustable end with an adjustable U-bracket on the other adjustable end with 1” x 14 TPI - 3.25” long threads.
Rear Lower Control Arms Built With 2” 7075 Aluminum Forged Johnny Joints on both adjustable ends with 1.25” x 12 TPI - 2.32” long threads.
Rear Upper Control Arms Built With 1.5” 7075 Aluminum Forged Johnny Joints on both adjustable ends with 1” x 14 TPI - 3.25” long threads.
| Vehicle | Jeep Wrangler JL / JLU (18–Present) |
| Brand | CORE 4X4 |
| Color | Black or Blue or Charcoal or Green or Light Green or Orange or Purple or Red or White or Yellow or Raw Aluminum or Custom Color - Other than what is listed above. Extra charge varies. We will reach out after order is placed. |
| Placement on Vehicle | Front Upper, Front Lower, Rear Upper, Rear Lower, Front, Rear |
| Mounting Style | Weld-On |
Reviews of Core 4x4
Specifications
| Color | Black, Blue, Charcoal, Green, Light Green, Orange, Purple, Red, White, Yellow, Raw Aluminum, Custom Color - Other than what is listed above. Extra charge varies. We will reach out after order is placed. |
| Vehicle | Jeep Wrangler JL / JLU (18–Present) |
| Brand | CORE 4X4 |
| Note to Core4x4: | - |
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