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392.66 392.66 USD 461.95

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Jeep Wrangler JK / JKU 07-18 2pc Crawl Series Rear Upper Adjustable Control Arms

SKU: CRL-J-JK-RU2
Fits: 2007 - 2018 Jeep Wrangler JK / JKU Add vehicle

392.66 392.66 USD 461.95

461.95

Starting at $110/mo or 0% APR with . See if you qualify

Build Your Kit

  • Vehicle
    Confirm this matches your vehicle. Use Shop by Vehicle to filter correctly.
  • Brand
  • Color
    Powder coat color for control arms and track bars. Does not affect performance.
  • Series
    Cruise: daily driving and light off-road. Camp: overlanding. Crawl: aggressive rock crawling.
  • Hardware
    Choose upgraded hardware if your factory hardware is worn, damaged, or missing.
  • Lift Size
    Choose your current front lift height. Measure from center of wheel to fender if unsure.
  • Note to Core4x4:

Select Color to see price and add to cart.

4–8 hr install Moderate Alignment recommended Lifetime warranty on all non-wear items Made In USA

Achieve Superior Off-Road Performance

Enhance your Jeep Wrangler JK’s off-road capabilities with the Crawl Series Rear Upper Control Arms (CRL-J-JK-RU2). Designed for Jeep JK models (2007-2018), these control arms deliver unmatched flexibility, improved alignment, and exceptional durability. Whether tackling rugged terrain or cruising city streets, they provide the strength and adjustability needed for optimal performance.

What's Included in the Kit

  • Crawl Series Rear Upper Control Arms (CRL-J-JK-RU2)

Key Features and Benefits

  • High-Strength Construction – Crafted from 1.5" OD DOM Tubing with a 5/16” wall thickness, these control arms deliver superior durability and outperform competitor offerings.
  • Johnny Joints for Maximum Articulation – Featuring original Johnny Joints at both ends, these control arms provide unmatched flexibility and smooth operation for extreme off-road performance and on-road comfort.
  • Adjustability for Lifts – Fully adjustable to accommodate lift heights from 0 to 6 inches, allowing precise alignment corrections, pinion angle adjustments, and axle re-centering. Custom solutions are available for lifts exceeding 6 inches.
  • Seamless Suspension Integration – Designed to work seamlessly with other Crawl Series components, these control arms enhance overall suspension harmony and drivability, providing consistent and reliable performance in all conditions.

Two-Stage Powder Coating

Each control arm undergoes a rigorous two-stage powder coating process for enhanced durability and corrosion resistance. Zinc primer base protects against rust. Topcoat available in 10 customizable colors offers a durable, stylish finish that complements your Jeep’s look.

Made in the USA

Proudly designed and manufactured in Orem, UT, the Crawl Series Rear Upper Control Arms exemplify the best in American craftsmanship. By choosing CORE 4X4, you support local industries while investing in premium-quality components that meet the highest performance standards.

Optional Hardware Upgrade

Installing the Crawl Series Rear Upper Control Arms is a straightforward process using your Jeep’s factory hardware. Optional Grade 8 hardware kits are available separately for vehicles with rusted or stubborn bolts, ensuring a hassle-free setup.

In Conclusion

Upgrade your Jeep Wrangler JK with the Crawl Series Rear Upper Control Arms (CRL-J-JK-RU2) for unmatched off-road flexibility, precise alignment, and durable performance. Designed for Jeep enthusiasts who demand the best, these control arms deliver consistent results on every trail and road. Invest in quality, reliability, and the ultimate driving experience today.


Make Model Submodel Years
Jeep Wrangler 2007 - 2018

Each rebuild kit includes all necessary components to replace and restore wearable parts.

Vehicle Jeep Wrangler JK / JKU (07–18)
Brand CORE 4X4
Color Black or Blue or Charcoal or Green or LightGreen or Orange or Purple or Red or White or Yellow or Custom Color - Other than what is listed above. Extra charge varies. We will reach out after order is placed.
Series Crawl Series
Hardware No Hardware or Complete Kit
Lift Size 0" — 6" or 6"+

See It Installed

Install videos and build guides on our YouTube channel.

Watch more installs on YouTube
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Reviews from Google

See all on Google
5.0
132 reviews
5
97%
4
2%
3
0%
2
1%
1
0%
AP
Ajay Paynter Mar 4, 2026
Google
Great company, who worked with me on shipping parts to arrive in time for a show. When I explained my concern they went above and beyond to make it happen. Quality of the parts is top notch.
RC
Ryan Colligan Mar 4, 2026
Google
I have nothing but good things to say about Core 4x4. I have the crawler series on my JKU and we take it all over the place. These parts handle everything we throw at them.
MT
Marcus Torres Jan 15, 2026
Google
Best control arms I have installed on any of my builds. After running every major manufacturer, Core 4x4 is on par or better than all the high-end companies at a fraction of the cost. Lifetime warranty is the cherry on top.
M
Matt Mar 23, 2024
Google
The best products on the market. 95% of my xj is core 4x4 products
MS
Mr. Smith Nov 23, 2025
Google
Have yet to get to try them but I bought some upper, and then later , lower control arms for my 03 rubicon. The pricing is very fair, so fair I was hesitant to even purchase. When the product came in I was happily mistaken. These are some beefy units with an incredible warranty! I’m very excited! I went with the “Camp”series as I mostly daily it. I have trouble with the shipping at times when I ordered but Corby is quick to notice things and help communicate the solution. Looking forward to buying more parts!
DW
Darin Wuebbels May 27, 2025
Google
Thanks for the fabulous customer service. Your products and customer service are first class. I highly recommend these guys. Excellent experience.
A
Adam Oct 24, 2025
Google
I couldn't have been more excited for the initial unboxing of these new Core 4x4 UCA's! They appear to be so well built and just a true quality product. Installation was a breeze and the initial testing with the forklift appears to have given me some additional flex with less binding on the rest of the components now that the geometry is back properly aligned. Time will tell how they hold up on my near future off-road adventures but I don't have any doubt that they are up to the task!
D
Don Jul 26, 2025
Google
Great shop, great parts and great service. You want to buy off this company and company’s like this!!!! Wish we had more companies as good as this one!! Thank you
D
Danny Oct 24, 2025
Google
Outstanding customer service to match the high quality parts. This is the go-to company.
EA
Eric Ahonen Mar 24, 2021
Google
Awesome control arms! My mechanic said “ your Jeep is pretty much bulletproof now.” And I just got the tier 1 arms! The people at the core 4x4 shop were really nice too. They were running behind on shipping, (which is understandable) so I decided to go pick it up because it was only an hour drive. They gave me a free $60 hardware kit for the inconvenience. Thanks core 4x4! You guys are awesome!!
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