Skip to Content
Get Free U.S. Shipping When You Spend $500+ on CORE 4X4 Products
Back to Shop

763.05 763.05 USD 897.70

897.70

As low as $159.00/mo with Learn More

More financing options ▸

1–3 day build time + Shipping

Choose Options & Buy →
https://core4x4.com/web/image/product.template/2131/image_1920?unique=edc8f61

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

763.05 763.05 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
Google

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.
GC
Grant Chaisson Jun 26, 2025
Google
These guys are awesome!! They have helped me build multiple jeeps from zjs to mjs and now with my lj build they all ways impress. There products are the best on the market in my eyes. The best part about it all is it's all made right here in american and shipped anywhere in the world 🌎 . Don't think twice when your looking for control arm or lift kits for your vehicle if these guys sell it BUY IT!!!
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
GK
GLENN KOSZKA Apr 27, 2025
Google
The folks at Core 4X4 are always wonderful to deal with. They explain your options and never pressure or rush things. The quality of the Core Control Arms is top shelf, especially if your goal is to stop wheel hop. I recommend Core 4x4 without reservation ! ! !
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!
DT
Dean Tk421 Feb 21, 2026
Google
I purchased the Jeep WJ control arms Camp series over a year ago. Very pleased and impressed. Easy installation and solid build. Bracket broke for rear upper control arm, they redesigned it to be more robust and sent me a new one with hardware, honoring their guarantee!
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!
GV
Gil Valk Sep 24, 2025
Google
Excellent service, Prompt responses when needing technical assistance, Amazing looking parts that fit excellently. I would recommend them to anyone looking for suspension components. Also very well packaged when we received the shipment, which means no damage from shipping company!! We went with the Crawl Series double adjustable kit and it definitely looks killer on our build!!!
Loading…
Add vehicle
SHOP BY VEHICLE
Home