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SKU: CRL-J-JL-RS4 ★★★★★ (132 reviews)
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LIFETIME WARRANTY
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FITS YOUR EXACT VEHICLE
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SHIPS IN 1–3 DAYS
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MADE IN UTAH, USA
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$ 852.82 852.82 USD $ 897.70

$ 897.70

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🔧 Built to order · Ships in 1–3 business days

COLOR 11 colors — pick yours
https://jerdev.core4x4.com/web/image/product.template/2132/image_1920?unique=1765362
SKU: CRL-J-JL-RS4
Fits: 2018 - Present Jeep Wrangler JL / JLU Add vehicle
Add Vehicle Google 5.0 ★★★★★ (132 reviews)

$ 852.82 852.82 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.

WHAT’S INCLUDED
4
Upper Control Arms
4
Lower Control Arms
2
Front Track Bars
2
Rear Track Bars
4
End Links

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

Made in USA Orem, Utah
Lifetime Guarantee Unconditional
10 Colors In-house powder coat
Ships in 3 Days From our UT facility
Fully Adjustable 0-6" of lift
3 X-Series Options Only Core 4x4

Why Builders Choose CORE 4X4

Warranty facts, not marketing language.

vs. MetalCloak

Their “lifetime” language refers to their service model. Actual parts warranty: 1 year. Ours: lifetime.

vs. Teraflex

Skip a maintenance interval? Their warranty voids. Ours doesn’t.

vs. Clayton Off Road

Clayton warrants their Johnny Joints for 90 days. We cover ours for life.

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.

Master Rebuild kit for CRL-J-JL-RS4 $ 168.00
Master Rebuild kit for CRL-J-JL-RL2 $ 84.00
Master Rebuild kit for CRL-J-JL-RU2 $ 84.00

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"+

Select your lift size in Step 1 — the kit ships with the correct geometry for that height. If you’re running a non-standard setup, call us before ordering and we’ll confirm compatibility.

Death wobble is a geometry problem, not just worn parts. Cruise Series corrects caster angle and eliminates the flex points that let shimmy start. Replacing one part at a time delays the fix — this replaces the geometry.

Yes, if you’ve done a lift kit before. Full-day project. Watch the complete JT install walkthrough on our YouTube channel — most owners wrap it in a day. Any off-road shop can run it if you’d rather have it done.

Any non-wear component fails — we replace it. No mileage cap. No maintenance intervals to track. No fine print about voiding if you miss a service. Lifetime means lifetime.

Teraflex’s lifetime warranty voids if you miss a maintenance interval. MetalCloak’s actual parts warranty is 12 months — their “lifetime” language refers to their service program. No conditions here.

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%
M
Matt Mar 23, 2024
★ ★ ★ ★ ★ Google
The best products on the market. 95% of my xj is core 4x4 products
PM
Paul Melancon Aug 25, 2025
★ ★ ★ ★ ★ Google
Ordered a control arm and track bar kit for my WJ from Core 4x4 on Monday 7/28 and received it today, Friday 8/1. Im not a state or two away, im in CT aka the other side of the country. Communication is phenominal, emails were responded too in an hour or less. Parts arrived well packed, not damaged, and are great quality for my needs. There arent many companies left that service customers as well as Core 4x4 and i wont hesitate to check them out again if i need something else. Well done!
Z
Zion Sep 24, 2025
★ ★ ★ ★ ★ Google
Every product I have received from them has been nothing short of fantastic. Korby in Customer service went above and beyond to help me fix my own mistake. I cannot reccomend them enough.
VK
Victor Keele Sep 24, 2025
★ ★ ★ ★ ★ Google
Great customer service. I got my front upper and lower control arms and hardware on Friday afternoon. It didn’t come with instructions so I called Core 4X4 and they immediately e mailed me the instructions. Also, the kit I got had the spacers missing so I called. It was late Friday by thus time but they took care of the issue first thing Monday morning and I got the spacers on Tuesday. Great company.
TW
Travis Walker Sep 24, 2025
★ ★ ★ ★ ★ Google
I have nothing but great things to say about this company and their customer service. If you like American made products backed by warranty and amazing customer support, this is the company for you. I have a Lexus GX470 and love their rear control arms.
A
Aaron Mar 23, 2024
★ ★ ★ ★ ★ Google
I have recently come to know Core 4x4 when I purchased a Jeep XJ and was looking for a place that had dedicated XJ suspension and components. Here is what makes them different than most other shops. All of their components are top shelf quality and they back it up if you break any of it. I was able to see their shop when I picked up an order locally and was impressed with their attention to detail and how they assemble and powder coat each part. I had an issue with a shackle and needed the threaded shaft to be shorter. I called in and talked to Kaden and he told me to come by and they would shorten it for me. When I got there, Kaden and Spencer (the owner) met me and talked about options and proceeded to make the right adjustments to fit my XJ. Told me if anything changes in the future and I need additional length, they would take care of me. So what really sets them apart from others is their Customer Service. Try calling in to any other Jeep suspension or part shop and see how they treat you. Been there - done that. Will continue to do business with Core and their team. Getting that kind of service for just a shackle has me thinking I may need to replace my JT components with Core's. Thanks Guys for being helpful good humans!
ZA
Zen Asher Mar 23, 2025
★ ★ ★ ★ ★ Google
The quality and durability of the arms are the best. They are super heavy duty. And lifetime warranty is crazy
OJ
Oldgreg jr Mar 23, 2025
★ ★ ★ ★ ★ Google
Good company, they offer well built parts and Great customer service. I had a couple of hang ups with my control arms that I purchased, they were very easy to work with and found the solution to make them work.
DN
Devan Nelson Mar 25, 2019
★ ★ ★ ★ ★ Google
Had a great experience with Core 4x4, I desperately needed a custom track bar and found out just a couple days before Easter Jeep Safari. Spence was a huge help and made it happen with plenty of time to spare. Their parts are top notch!
MM
MIKE (Mike the Mechanic) Jul 26, 2025
★ ★ ★ ★ ★ Google
Amazing company and customer service!!!! I messed up on my order and the fixed it immediately. Would definitely recommend them. Can't wait to hit the trails with their product.

Specifications

Color Black, Blue, Charcoal, Green, LightGreen, Orange, Purple, Red, White, Yellow, Custom Color - Other than what is listed above. Extra charge varies. We will reach out after order is placed.
Hardware No Hardware, Complete Kit
Lift Size 0" — 6", 6"+
Vehicle Jeep Wrangler JL / JLU (18–Present)
Brand CORE 4X4
Series Crawl Series
Note to Core4x4: -
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