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718.16 718.16 USD 897.70

897.70

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Jeep Wrangler JL / JLU 18+ 4pc Crawl Series Rear Adjustable Control Arm Kit

SKU: CRL-J-JL-RS4
Fits: 2018 - Present Jeep Wrangler JL / JLU Add vehicle

718.16 718.16 USD 897.70

897.70

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

Transform Your Jeep’s Rear Suspension

Upgrade your Jeep Wrangler JL with the Crawl Series Rear Control Arms Set, the ultimate solution for superior off-road flexibility and on-road performance. Designed to accommodate Jeep models from 2018 to present, this set includes two rear upper control arms (CRL-J-JL-RU2) and two rear lower control arms (CRL-J-JL-RL2). With heavy-duty construction and advanced adjustability, these control arms ensure your rear axle stays centered and aligned, even under the most demanding conditions.

What's Included

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

Key Features and Benefits

  • Built for Extreme Durability – The upper control arms feature 1.5” OD x 5/16” DOM Tubing, while the lower control arms are constructed from 1.75” OD x 5/16” DOM Tubing, offering unmatched strength and resilience for off-road and on-road applications.
  • Precision Suspension Geometry – Fully adjustable to accommodate lifts from 0 to 6 inches, these control arms enable precise alignment correction, axle centering in the wheel well, and optimal pinion angle adjustment.
  • Enhanced Articulation with Johnny Joints – Original RockJock Johnny Joints at both ends of each arm provide unparalleled articulation and flexibility, ensuring smooth suspension movement over rugged terrain.
  • Complete Suspension Solution – Pairing this set with our Crawl Series Front Control Arms creates a full suspension upgrade, providing comprehensive control and stability across all terrains.

Durable Two-Stage Powder Coating

Each control arm is treated with a rigorous two-stage powder coating process. A zinc primer base ensures excellent corrosion resistance. The durable top coat, available in 10 customizable colors, adds a layer of protection and style.

Proudly Made in the USA

Manufactured in Orem, UT, the Crawl Series Rear Control Arms Set reflects CORE 4X4’s commitment to exceptional quality and American craftsmanship. By handling the production process in-house, we ensure top-tier products that support local industries.

Straightforward Installation

  • Designed for an optional hardware upgrade process, these control arms use factory hardware for a seamless fit.
  • Optional Grade 8 hardware kits are available separately for dealing with rusted or stubborn bolts.

In Conclusion

The Crawl Series Rear Control Arms Set (CRL-J-JL-RS4) delivers the ultimate combination of durability, adjustability, and flexibility for your Jeep Wrangler JL. By upgrading your suspension with this set, you’ll enjoy improved stability, precise axle alignment, and the confidence to conquer any trail. Pair with other Crawl Series components for a complete suspension overhaul and elevate your off-road adventures to the next level.


Make Model Submodel Years
Jeep Wrangler 2018 - Present

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

Vehicle Jeep Wrangler JL / JLU (18–Present)
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.
JM
Jay Miller Jul 26, 2025
Google
I purchased a upper and lower set of control arms from core 4x4 they came early then expected and seem to be very nice quality I ran into a complication installing them and emailed them my question I was expecting to get the response maybe the next day because it was after hours I got a response in about a few minutes which allowed me to finish the project that day I super appreciate that, the products are good strong lifetime warranty and their customer service is top notch
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
8
89Patriot Jan 22, 2026
Google
Great company! I have used there products consistently with no complaints with quality you can see and feel. From my experience, their customer service is also amazing. Core 4x4 has no issues standing behind their already amazing products and will quickly and professionally solve issues may they arise. I will continue to be a customer.
BM
Brantly Musgrave Jan 22, 2026
Google
First and foremost would like to say that Core4x4s customer service is top notch and they definitely stand behind their warranty on products! Highly recommend using them for any of your off road needs! It’s rare to find a company now a days that backs their products and they do! Had a few issues with mounts and control arms and they handled it without hesitation! Thank you!
CD
Christopher Dami Jun 26, 2025
Google
2022 I ordered a 2023 Jeep Wrangler Rubicon in High Velocity yellow. Without any hesitation I knew I was going with Core 4x4’s 16pc Camp series suspension, powder coated in yellow. Compliments were a given from any and everyone that looked under my jeep. So beefy, I may have left some yellow paint on the rocks from Maine to Florida, but no bends or breaks. Customer service has been perfect each and every time I have needed something. Their warranty is top notch! Their communication is also wonderful. Might upgrade to the Crawl Series control arms where the Johnny joints are on both sides. Great all around company and a great team to troubleshoot your issue and come to a conclusion. Nothing bad to say about this company. Just love this suspension.
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!
TM
Tony Moller Aug 25, 2025
Google
Awesome parts! Support the older Jeeps! Great customer service.
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