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Adjustable
Long Arm Kit
Complete
Kit
(1)
SKU: J-JK-C-LAK8

$3,799.95

To properly clear 40″ tires a minimum of 70″ wheel mount to wheel mount is required for the aluminum front lower control arms.

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Crawl Series Long Arm Upgrade Kit for the Jeep Wrangler JK (J-JK-C-LAK8)

ADVANCED INSTALLATION NEEDS

The installation process requires precise cutting and welding and is best suited for those experienced in vehicle modification. For more installation information we recommend you WATCH THIS VIDEO.

EXPERIENCE UNPARALLELED OFF-ROAD PERFORMANCE AND ON-ROAD COMFORT

The CORE 4×4 Crawl Series Long Arm Upgrade Kit for the Jeep Wrangler JK takes your suspension to the next level, delivering top-notch performance and durability. Our long arms bring serious strength, stability, and higher ground clearance. The upper control arms tuck neatly into the frame rail, freeing up space for better movement at lower lifts, which means a smoother ride and more confidence on the trails.

From daily commuting to rugged off-road excursions, added weight from spare tire racks or roof racks, or even desert racing, our JK Long Arm Kit is engineered to endure, delivering a superior ride quality and performance that define Core 4×4 products.

DESIGN FEATURES
  • Full weld-on brackets
  • True 4 link long arm design Improved ride quality
  • 5/16” wall DOM tubing front upper control arms
  • 2” solid  7075 aluminum lower front and rear control arms.
  • 1.5” solid 7075 aluminum rear upper control arms.
  • 3/16” plate steel Brackets
  • Unique upper control arm bends to allow for maximum travel up and down without body modifications.

WHY CHOOSE OUR LONG ARM KIT?
  • PERFORMANCE, STABILITY, AND RIDE QUALITY
Featuring our thickest tube wall and most flexibility this kit is great for extreme off-roading and can take anything you can throw at it. Longer arms means your suspension cycles on a longer arch giving your axle a smoother and more consistent range of motion.

COMPREHENSIVE UPGRADE This kit offers a substantial improvement to your vehicle’s performance, including enhanced alignment and axle centering. It’s a complete overhaul of your vehicle’s suspension and control arms.

  • TWO-STAGE POWDER COATING
Our control arms, track bars, and steering kit components are treated with a rigorous two-stage powder coating process for enhanced durability. A zinc primer base ensures excellent corrosion resistance, while the top coat, available in 10 color options*, allows you to add a touch of personal style to your vehicle.

  • PROUDLY MADE IN THE USA
All components in our Long Arm Kits are proudly manufactured in the USA. Our commitment to high-quality domestic manufacturing and adherence to strict quality standards is a testament to our brand’s ethos.

REFINED QUALITY AND DESIGN

  • 7075 Aluminum Control Arms
The control arms are crafted from solid 2-inch and 1.5-inch 7075 aluminum, offering a perfect balance of strength and lightness for enhanced handling and performance.
  • Laser-Cut and Precision Bent Brackets
The brackets, made from 3/16″ steel, are laser-cut and precision bent, ensuring a robust and exact fit for the JK’s specific frame.

*We can do custom colors upon request.
Series
Color OptionsCharcoal, Orange, Yellow, Blue, Green, Light Green, Red, Purple, Black, White
Built With1.75" OD 5/16" Wall On lower control arms, 1.5" OD 5/16" Wall On upper control arms
Grease FittingsIncluded
Lift Range
Fixed End
Thread Size1" x 14 TPI on upper control arms, 1.25" x 12 TPI on lower control arms
Thread Length
Make Model Year
0

FAQs

Our product lines are designed to offer the absolute most value for your budget. Not every build is the same and we understand that. Our series differ mostly in the components used in the construction of the parts. Our Cruise and Town Series utilizes our high grade flex poly bushings at both ends of the arm, this has proven to be a smooth riding easy to maintain and replace bushing that we absolutely love. Our Camp and Trail Series utilizes 5/16″ wall DOM tubing and incorporates a flexible Johnny Joint at the adjusting end, this series has been our most popular series for all around use, great for daily drivers that want to tear up the trails as well. Our Crawl, Tow, and Track Series utilizes the same 5/16″ wall DOM tubing, but features Johnny Joints at both ends. This series gives you the absolute most out of your suspension. This is great for heavy towing/hauling and extreme off-roading. Also, if the component is straight in these series we will machine these left and right hand threaded for easy adjustment on the vehicle!

We are constantly expanding our product lines to include complete kits, if you don’t see something on the site for your vehicle, reach out to our sales team and we can put something together for you.

Our two main sizes of jam nuts require an1-1/2″ wrench or an 1-5/8″ wrench. Generally speaking the 1-5/8″ jam nuts are used on our lower control arms and the 1-1/2″ jam nuts on our upper control arms and track bars. There are some exceptions, but we do offer a crow’s foot that has both sizes.

Any non-synthetic moly based grease is safe on our products, avoid lithium greases and anything red as this can prematurely deteriorate the internal components of the Johnny Joints and bushings used on our parts.

1 review for Adjustable Complete Kit Long Arm Kit – Jeep, Wrangler JK/JKU, 2007, 2018

  1. Luis Sabido

    Can’t wait!!!! Been waiting for this for a very long time!

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A promise from the owner

If you manage to break It,
we'll replace it.

As the founder of Core 4×4, I stand behind our unwavering commitment to delivering top-tier, American-made products that don’t break the bank. We take immense pride in our craftsmanship, sourcing materials domestically to ensure the highest quality possible. Our team goes the extra mile to rigorously test and refine every product, ensuring it not only meets but exceeds industry standards. When you choose us, you’re choosing durability, reliability, and affordability. That’s not just a business model— it’s a promise, from our family to yours.

Sincerely,
Spence Schramm
Founder, Core 4×4