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

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

Name: Jeep Wrangler JL / JLU 18+ 4pc Crawl Series Rear Adjustable Control Arm Kit
Brand: CORE 4X4
SKU: CRL-J-JL-RS4
Price: 897.7 USD
Availability: InStock

SKU: CRL-J-JL-RS4

Fits: 2018 - Present Jeep Wrangler JL / JLU Add vehicle

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5.0 ★★★★★ (132 reviews)

$ 807.93 807.93 USD $ 897.70

$ 897.70

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Build Your Kit

Vehicle
- Jeep Wrangler JL / JLU (18–Present)
Confirm this matches your vehicle. Use Shop by Vehicle to filter correctly.
Brand
- CORE 4X4
Color

Powder coat color for control arms and track bars. Does not affect performance.
Series
- Crawl 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.

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.

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"+

See It Installed

Install videos and build guides on our YouTube channel.

Watch more installs on YouTube

Reviews from Google

See all on Google

5.0

★ ★ ★ ★ ★

132 reviews

5 ★

97%

4 ★

3 ★

2 ★

1 ★

Ajay Paynter Mar 4, 2026

★ ★ ★ ★ ★

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.

Ryan Colligan Mar 4, 2026

★ ★ ★ ★ ★

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.

Marcus Torres Jan 15, 2026

★ ★ ★ ★ ★

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.

Leonard Smith Jan 22, 2026

★ ★ ★ ★ ★

I don’t write reviews often, but Core 4x4 absolutely earned this one. I recently ordered leaf spring mounts and realized after the fact that I messed up my order. Totally my mistake. Instead of giving me the runaround or pointing at a return policy, Core 4x4 emailed me back and forth, worked through exactly what I was doing with my build, and made sure I ended up with the correct parts. That kind of customer service is rare these days — especially in the off-road world where a lot of companies stop caring once the order is placed. The parts themselves are exactly what you hope for: solid, well-made, confidence-inspiring hardware that looks like it belongs under a vehicle that actually gets used. You can tell these are designed by people who understand suspension geometry and real-world abuse, not just CAD screenshots. Mistakes happen — especially on custom or modified builds — and Core 4x4 handled mine like pros. Fast responses, clear communication, and a genuine effort to help me get it right. If you’re on the fence: don’t be. Core 4x4 is the kind of company you want backing your build — the kind that treats customers like fellow enthusiasts, not order numbers.

luke Mar 24, 2021

★ ★ ★ ★ ★

Excellent quality product and service. My l lower control arms broke and within the same day core 4x4 hooked me up with tier 2 arms and with the color I wanted. My Jeep rides better and has been solid for several months so far. 10/10 would recommend their products to anyone.

Gil Valk Sep 24, 2025

★ ★ ★ ★ ★

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!!!

Cade Leith Mar 23, 2024

★ ★ ★ ★ ★

Have full upper/lower CA set on both front and rear axles on a 96 ZJ. These are the rubber bushing sets not joint sets. I have beat the hell out it in the Nevada desert for 2 years and has been great. I don’t go fast but I do articulate suspension a lot. Super solid and haven’t any issues. Just inspected the entire set recently due to some banging under it. Turns out the banging is lower rear shock bushings. Inspected each CA along the way nothing. Aside from dirt and obviously winter roads and what not still in excellent condition, bushings are solid like the day they were installed. I’ll add that I’m about tapped on a short arm at 4.25(less with settle) so the front CA’s get beat on just from that, still they’re like new. Paint is great condition, this set is red. I would definitely buy again. Another plus for me, Utah isn’t local necessarily, but it’s nice to support businesses closer to me.

Erica Grissom May 27, 2025

★ ★ ★ ★ ★

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

Mirko Pompili Mar 19, 2026

★ ★ ★ ★ ★

I want to share a truly positive experience. I ordered a car kit consisting of two packages, but unfortunately one was lost during shipping with UPS. The situation could have become complicated... but it didn't. The company manager was extremely helpful and professional: he personally followed up on the situation and did everything he could to resolve the issue, even sending me the package again without hesitation. It's rare to find such attentive and reliable customer service these days. My sincere congratulations on your professionalism and commitment: that makes all the difference.

oleg k Nov 23, 2025

★ ★ ★ ★ ★

I recently ordered a set of control arms from Core 4x4, and the entire experience was absolutely top-notch from start to finish. The ordering process was smooth, the parts arrived quickly, and the control arms themselves are extremely high quality—solid construction, great finish, and clearly built to last. I also want to give a special shout-out to Korby, the guy I spoke with during the process. His customer service was amazing. He went above and beyond to make sure I got exactly what I needed, answered all my questions, and made the whole experience stress-free. You don’t see service like that very often these days. If you’re looking for high-quality suspension components backed by truly exceptional customer service, I highly recommend Core 4x4. I’ll definitely be buying from them again.