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807.93 807.93 USD 897.70

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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

807.93 807.93 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.
JJ
Jason Jukich Jul 26, 2025
Google
Fast shipping, excellent communication, and awesome products
BB
Brayden Brockey Mar 23, 2024
Google
Got a set of upper control arms for my xj, really impressed with the quality
SG
Sal Giordano Sep 24, 2025
Google
I want to take the time to share my experience with Core 4x4. I have a 2004 Jeep Wrangler and was looking to upgrade some suspension parts. I went with Core 4x4 upper & lower adjustable control arms and a front adjustable track bar. Everything arrived quickly, and right out of the box I was impressed with the quality and craftsmanship. I had a few questions during installation (measurements and torque specs), and I spoke with Korby on a couple of occasions. Not only did he send me detailed instructions, but he also shared an installation video specific to the part and vehicle I was working on, something you don’t get from many companies. The control arms fit perfectly, look great, and perform exactly as I hoped. I did run into an issue with the front track bar touching the front diff. When I reached out, Korby had me send pictures and then immediately offered two solutions: his bar guy could make a different bend and send it out to me, or I could get a full refund. His response honestly blew me away. As much as I wanted to run the Core 4x4 track bar, I chose the refund. Korby sent me a prepaid shipping label right away, no hassle. My experience with Core 4x4 has been excellent. Korby was extremely understanding, communicative, and helpful every step of the way. The parts I received were high quality, and the customer service was second to none. I would absolutely recommend Core 4x4 10 out of 10 times and will be using them again. Just a great American company with awesome people who truly care about their customers. Thank you Korby, and thank you Core 4x4!
S
Sebastian Oct 24, 2025
Google
Great products they sell, got a crawl series long arm kit for my xj and it has held up quite nice, they are beefy, and for what ever reason they fail it has a great warranty with a customer service to match, when someone asks what control arm kit to buy I always recommend core 4x4
EG
Erica Grissom May 27, 2025
Google
First off, I wish I knew about them sooner. The customer service is top tier. The response time is about 30 min no waiting 1-3 days to get a response. The parts are heavy-duty and look amazing. The packaging is perfect, I can't wait to hit some trails. Thanks Core4x4
DR
David Rogers Aug 25, 2025
Google
Ive had the front adjustable control arm kit in bright green for my 1996 ZJ. Ive had the kit for about a year now and i have to say, im extremely impressed, over 1000 miles off-road and roughly 20,000 miles on the highway. These control arm kits for any vehicle built by core 4x4 are well worth the money, just be aware thereight be some minor scatches or chips from shipping ( but who should care about that if you're beating the crap out of em' they way they were built and designed for)
B
Ben Mar 24, 2021
Google
2001 Wrangler TJ- i have purchased all front/rear upper/lower control arms. Front track bar and rear track bar. Quality is excellent and extremely durable you can tell its built to last. Bent a bolt on the front track bar and called and spoke with Spence. He immediately sent me out new hardware plus some! Product is amazing but what really separates companies apart is their service and these guys are second to none. Thank you all!
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