Transform Your Jeep’s Front Suspension for Maximum Off-Road Dominance
Take your 2007-2018 Jeep Wrangler JK to the next level with the CORE 4X4 JK Front Long Arm Kit (J-JK-F-LAK4)—a massive suspension upgrade that enhances articulation, ride quality, axle stability, and durability. This weld-on kit completely redefines your front 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 front long arm kit provides unparalleled handling and durability.
Key Features and Benefits
- Optimized Suspension Travel Geometry – The true long arm design extends the control arm mounting points, allowing for a longer arc of suspension travel. Reduces axle steer and bump steer, improving both high-speed stability and low-speed crawling performance. Allows for a smoother ride, better flex, and superior traction across all terrains.
- Ultra-Strong 7075 Aluminum Lower Control Arms Reinforced Steel Upper Control Arms – Front Lower Long Arms are constructed from massive 2-inch 7075 aluminum, offering a perfect blend of lightweight durability and flexibility. Front Upper Long Arms are made from 1.5-inch DOM steel with a frame clearance bend, ensuring maximum articulation without interference and proper suspension cycling. The ‘memory’ of 7075 aluminum means that when impacted off-road, the arms flex 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 – All frame brackets are laser-cut and precision-bent from 3/16” steel, delivering an unbreakable mounting system that eliminates flex and provides rock-solid stability.
- Full-Width Axle Compatibility Steel Arm Option – For optimal tire clearance and improved suspension geometry, full-width axles are recommended with 7075 aluminum control arms. For those retaining factory-sized axles, we offer a steel control arm option with optimized bends to ensure proper clearance and fitment.
Weld-On Installation for a Permanent Performance Upgrade
This kit requires cutting and welding for installation, ensuring a permanent and incredibly strong suspension system. Professional installation is recommended for the best results.
Recommended Pairing
For a complete long arm suspension solution, pair this Front Long Arm Kit with our Rear Long Arm Kit (J-JK-R-LAK4) for full axle control, maximum stability, and improved handling across all terrains.
Two-Stage Powder Coating for Maximum Durability
To enhance corrosion resistance and customization, 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
At CORE 4X4, we manufacture our Long Arm Kits in Orem, UT, using only the highest quality American-sourced materials. Our commitment to strict quality control, rigorous testing, and precision engineering ensures 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 JK Front Long Arm Kit (J-JK-F-LAK4) is the ultimate front suspension upgrade for Jeep Wrangler JK 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 JK 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 JK 07-18 – This long arm kit provides a massive suspension upgrade by increasing suspension travel and enhancing ride quality, axle stability, and traction for extreme off-road capability.
CORE Advantage: The kit extends the control arm mounting points, improving suspension geometry for smoother travel, better flex, and more axle control. It reduces axle steer and bump steer, significantly enhancing low-speed crawling and high-speed stability.
Adjustability: The kit offers on-vehicle adjustability for axle positioning and alignment. Precision fine-tuning for 0-6 inches of lift ensures optimal suspension geometry and performance, making it easier to adjust while maintaining superior control and alignment.
Construction: Built with ultra-durable 7075 aluminum (2” OD) for the front lower control arms, and reinforced steel (1.5” DOM) for upper control arms, this kit provides extreme strength and flexibility. The aluminum arms return to their original shape after off-road impacts, ensuring consistent 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 1.75” OD 5/16” Wall DOM. 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” OD 5/16” Wall DOM. 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 | 2007 - 2018 |
Each rebuild kit includes all necessary components to replace and restore wearable parts.
Construction & Materials
Front Lower Control Arms Built With 1.75” OD 5/16” Wall DOM. 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” OD 5/16” Wall DOM. 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 JK / JKU (07–18) |
| 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 JK / JKU (07–18) |
| Brand | CORE 4X4 |
| Note to Core4x4: | - |
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