Upgrade Your Jeep’s Front Suspension for Superior Off-Road Capability
Take your 2018-Present Jeep Wrangler JL to the next level with the CORE 4X4 JL Front Long Arm Kit (J-JL-F-LAK4)—a high-performance suspension upgrade engineered for maximum articulation, stability, and durability. This weld-on kit completely transforms your front suspension geometry, providing a longer arc of travel for smoother suspension movement, better traction, and improved off-road performance.
Designed for serious off-roaders, this kit features extended-length control arms, precision-engineered bracketry, and industry-leading materials, ensuring unparalleled handling, strength, and reliability. Whether you're conquering technical rock crawls, high-speed desert runs, or rugged trails, this front long arm kit delivers next-level suspension performance.
Key Features and Benefits
- Optimized Suspension Travel Geometry – The long arm design extends the control arm mounting points, creating a longer suspension arc for smoother articulation, better traction, and improved ride quality. Reduces axle steer and bump steer, providing superior handling across all terrains.
- Ultra-Strong 7075 Aluminum Control Arms with ‘Memory’ – Constructed from massive 2-inch and 1.5-inch 7075 aluminum, these control arms flex upon impact and return to their original shape, maintaining proper suspension geometry and long-term reliability.
- Precision-Welded 3/16” Steel Brackets for Maximum Durability – All frame brackets are laser-cut and precision-bent from 3/16” steel, ensuring an unbreakable mounting system that eliminates flex and maximizes front-end stability.
- Full-Width Axle Compatibility Steel Arm Option – For optimal tire clearance and suspension geometry, full-width axles are recommended with 7075 aluminum control arms. If retaining factory-sized axles, we offer a steel control arm option with optimized bends for proper clearance and fitment.
Weld-On Installation for a Permanent Performance Upgrade
This kit requires cutting and welding, ensuring a permanent and incredibly strong suspension system. Professional installation is recommended for best results.
Recommended Pairing
Pair this Front Long Arm Kit with our Rear Long Arm Kit (J-JL-R-LAK4) for a complete suspension transformation and maximum off-road capability.
Two-Stage Powder Coating for Maximum Durability
To ensure superior corrosion resistance and longevity, all control arms undergo a two-stage powder coating process. The first stage includes a zinc primer base coat for rust prevention. The second stage applies a durable topcoat, available in 10 colors, allowing you to customize your suspension components while ensuring long-lasting protection. Brackets are shipped in raw steel to allow for 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 Front Long Arm Kit (J-JL-F-LAK4) is the ultimate front 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 Front 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 front suspension upgrade enhances articulation, ride quality, and axle stability, delivering a smoother ride and improved traction on extreme off-road terrain and challenging trails.
CORE Advantage: The true long arm design extends the control arm mounting points, increasing the suspension arc for smoother travel and better articulation. This reduces axle steer and bump steer, improving both high-speed stability and crawling performance.
Adjustability: On-vehicle adjustability allows for fine-tuning caster, pinion angles, and axle alignment without removal, ensuring perfect suspension geometry for lifts from 0 to 6 inches. It also ensures compatibility with larger tire fitments without rubbing.
Construction: Built with ultra-strong 7075 aluminum (2" OD for lower arms, 1.5" OD for upper arms), these control arms provide a perfect blend of lightweight durability and impact resistance. The ‘memory’ of 7075 aluminum ensures the arms return to their original shape after impact.
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.
| 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.
| 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. |
| Lift Size | 6"+ or 4" — 6" |
| Axle Setup | Full Width Front Axle (Aluminum Lowers) or Less than 70" axles (Bent Steel Lowers) |
| Placement on Vehicle | Front Upper, Front Lower, Front |
| Mounting Style | Weld-On |
Use the vehicle selector on our website to shop by your year, make, and model. On product pages, use the kit builder to select your color, series, lift height, and any add-on options, then add to cart. If you need help, call or email our team.
Standard orders typically ship within 1–3 business days of ordering. Custom color orders take approximately 5–10 business days. Because everything is built in-house, we can turn orders quickly even for custom specifications.
You can reach our team through the contact form on our website, or browse to the Contact Us page. Our team is available to answer pre-sale and technical questions before and after your purchase.
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. |
| Lift Size | 6"+, 4" — 6" |
| Axle Setup | Full Width Front Axle (Aluminum Lowers), Less than 70" axles (Bent Steel Lowers) |
| Vehicle | Jeep Wrangler JL / JLU (18–Present) |
| Brand | CORE 4X4 |
| Note to Core4x4: | - |
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