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Jeep Wrangler JK / JKU 07-18 4pc Crawl Series Rear Adjustable Control Arm Kit

SKU: CRL-J-JK-RS4
Fits: 2007 - 2018 Jeep Wrangler JK / JKU Add vehicle

897.70 897.7 USD 897.70

897.70

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

Unmatched Flexibility and Durability

Upgrade your Jeep Wrangler JK’s suspension system with the Crawl Series Rear Control Arms Set (CRL-J-JK-RS4). Designed for superior off-road performance and reliable on-road handling, this set includes two upper (CRL-J-JK-RU2) and two lower (CRL-J-JK-RL2) control arms. Engineered for strength, flexibility, and durability, this set delivers the ultimate suspension upgrade for Jeep enthusiasts who demand the best.

What's Included in the Kit

  • Crawl Series Rear Upper Control Arms (CRL-J-JK-RU2)
  • Crawl Series Rear Lower Control Arms (CRL-J-JK-RL2)

Key Features and Benefits

  • Heavy-Duty Construction – The upper control arms are built from 1.5” OD x 5/16” DOM Tubing, while the lower control arms feature massive 1.75” OD x 5/16” DOM Tubing. These materials ensure exceptional strength and durability, outperforming stock and aftermarket alternatives.
  • Johnny Joints for Maximum Articulation – All control arms are equipped with original Johnny Joints at both ends, delivering extreme off-road flexibility and superior ride quality on-road.
  • Adjustability for Lifted Jeeps – Fully adjustable to accommodate suspension lifts from 0 to 6 inches, enabling precise alignment, axle centering, and suspension geometry optimization. For lifts beyond 6 inches, custom options are available upon request.
  • Complete Suspension Harmony – Designed to work seamlessly as part of the Crawl Series system, these control arms integrate flawlessly with other Crawl Series components, creating a cohesive suspension setup that enhances overall performance and drivability both on and off the trail.

Two-Stage Powder Coating

Every control arm is treated with a durable two-stage powder coating process for enhanced resistance to rust and corrosion. The zinc primer base ensures a strong protective layer, while the topcoat, available in a range of 10 colors, adds durability and customization options for your Jeep.

Made in the USA

The Crawl Series Rear Control Arms Set is proudly designed and manufactured in the USA. By choosing this product, you’re supporting American craftsmanship and investing in premium quality components that stand the test of time.

Optional Hardware Upgrade

  • Installation is straightforward using your Jeep’s factory hardware.
  • For vehicles with rusted or stubborn bolts, optional Grade 8 hardware kits are available to ensure a smooth installation process.

In Conclusion

Choose the Crawl Series Rear Control Arms Set (CRL-J-JK-RS4) to elevate your Jeep Wrangler JK’s suspension performance. With heavy-duty construction, premium Johnny Joints, and full adjustability, this set delivers unmatched off-road flexibility and reliable on-road handling. Designed for Jeep enthusiasts who demand the best, this set offers durability, precision, and American-made quality. Upgrade your suspension system today and conquer any terrain with confidence.

 

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.
N
niceguyr1 Mar 24, 2023
Google
I purchased upper and lower adjustable arms for my WJ and lowers were missing the spacers. I didn't know until 3 months later when I was installing them. With absolutely zero hassles they quickly sent me the missing spacers. Fantastic product and service! Huge thank you guys for the awesome service and parts!!! Customer service is quickly becoming a lost commodity and you guys gave me hope that it's still alive and well, you just have to buy from the right people... Thanks again for going above and beyond! 👍👍
C
caleb Mar 24, 2022
Google
Absolutely a great company. Ordered rear lower control arms with hardware but when i got it the hardware wasn't there but they sent it out right away and got a free t-shirt! Highly recommend.
TD
Tim Davis Sep 24, 2025
Google
Customer service is amazing, responds fast and know what they are talking about. Their product looks top of the line.
MH
mark hinz Mar 2, 2026
Google
Went above and beyond to get the parts we needed to complete our customers build for Moab Easter safari cant thank you enough for all your hard work and efforts Thank you and look forward to working with you in the near future
JS
Jon Stempien May 27, 2025
Google
Big thanks to Corby at core 4 x 4 outstanding customer service I like to thank them or 4 x 4 for helping me Well-made product in the United States recommend core 4 x 4 for all jeep Owners that like the four wheel
RH
Roger Hooks Jun 26, 2025
Google
2018 Ram 2500 Rear Control Arms and Rear track Bar been running for about a year, Great Solid Products and great one on one customer service, same day response with issue resolved! Thanks Korby!
DA
Dastrup Auto Mar 25, 2019
Google
I have bought a bunch of sets of arms, track bars and even had custom work done by Core 4x4. Just yesterday, Spence and Cam delivered an awesome cross member they designed and built for me! All of their products have been exceptional! I have personally seen their progression with design changes/updates. They truly take pride in their work and products. Quality control is second to none! They’ve also helped me diagnose issues with different jeeps I’ve had, as well as Dodge/Rams. These guys know their stuff! Really! I trust them whole heartedly and absolutely love their products/quality of work! I’ve referred many people, and will always continue to do so. Keep up the good work Core4x4!
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