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SKU: R-TRX-2021-AL-RS4 ★★★★★ (132 reviews)
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🔧 Built to order · Ships in 1–3 business days

COLOR 12 colors — pick yours
https://jerdev.core4x4.com/web/image/product.template/1374/image_1920?unique=0d20961

Ram TRX 21-24 4pc Rear Adjustable Control Arms Kit

SKU: R-TRX-2021-AL-RS4
Fits: 2021 - 2024 Ram TRX Add vehicle
Add Vehicle Google 5.0 ★★★★★ (132 reviews)

$ 2,047.45 2047.45 USD $ 2,047.45

$ 2,047.45

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.
  • 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

Unmatched Strength, Stability, and Adjustability

Power up your 2021-Present RAM TRX with the CORE 4X4 7075 Aluminum Rear Control Arm Set (R-TRX-2021-AL-RS4)—an elite suspension upgrade designed to take your already ferocious off-road machine to an entirely new level of performance. Built for high-speed desert racing, rocky trails, and everything in between, these control arms are the premium solution your TRX deserves. If you’re ready to dominate the toughest terrains and showcase unmatched handling, durability, and axle alignment, these arms will let you unleash the full potential of your truck.

What’s Included in the Set

  • Adjustable Rear Upper Control Arms – R-TRX-2021-AL-RU2
  • Adjustable Rear Lower Control Arms – R-TRX-2021-AL-RL2

Key Features and Benefits

  • Heavy-Duty 7075 Aluminum Construction – Built from 2.5” OD 7075 aluminum, offering maximum strength, longevity, and weight savings over steel alternatives.
  • Massive 3.0” Rock Jock Johnny Joints – Fully greaseable and rebuildable 1.5” threaded joints for unmatched durability, flexibility, and suspension articulation.
  • On-Vehicle Adjustability for Precision Alignment – Left-hand and right-hand threaded adjusters allow for quick axle centering and pinion angle correction without removal.
  • Engineered for Extreme Off-Road Desert Racing – Ensures improved tracking, reduced tire wear, and enhanced ride quality under the most intense performance demands.

Optional Hardware Upgrade

This control arm set installs using factory hardware for a direct bolt-on fit. For trucks with rusted or stubborn bolts, we offer Grade 8 hardware kits separately for a hassle-free installation.

Performance-Driven Engineering for Maximum Control

Our 7075 aluminum rear control arm set is meticulously designed to enhance suspension geometry, improve traction, and eliminate weak factory components. Key advantages include:

Smoother articulation and reduced stress on bushings and mounting points.

Fine-tuned suspension adjustability for perfect axle centering and pinion angles.

Unmatched durability for high-speed desert runs, technical rock crawling, and unstoppable off-road performance.

This set isn’t just an upgrade—it’s a complete transformation for your truck’s rear suspension, providing long-term reliability and top-tier performance worthy of the RAM TRX’s premium pedigree.

Two-Stage Powder Coating for Maximum Durability

To ensure long-term corrosion resistance, all aluminum components undergo a two-stage powder coating process:

Zinc primer base coat for superior rust protection.

Top coat available in 10 colors to match your truck’s aesthetics and ensure long-lasting durability.

Proudly Made in the USA

Manufactured in Orem, UT, our CORE 4X4 7075 Aluminum Rear Control Arm Set is built using high-quality, American-sourced materials under strict quality control standards. Supporting American manufacturing means investing in superior craftsmanship and unmatched reliability.

In Conclusion

The CORE 4X4 7075 Aluminum Rear Control Arm Set is the ultimate suspension upgrade for RAM TRX owners seeking superior adjustability, long-lasting durability, and high-performance handling. By replacing weak factory components with aircraft-grade 7075 aluminum, you ensure greater stability, improved ride quality, and unrivaled reliability for extreme off-road desert racing—and beyond. Upgrade today and experience the CORE 4X4 difference—because your RAM TRX deserves nothing less than the very best.


Make Model Submodel Years
Ram TRX 2021 - 2024

Vehicle Ram TRX (21–24)
Brand CORE 4X4
Color Black or Blue or Charcoal or Green or LightGreen or Orange or Purple or Red or White or Yellow or Raw Aluminum or Custom Color - Other than what is listed above. Extra charge varies. We will reach out after order is placed.

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
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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%
NM
Noah Myers Mar 23, 2024
★ ★ ★ ★ ★ Google
I contacted these guys on a Saturday through email and needed some control arms by the following weekend, Spence got back with me and told me he would make sure the order got shipped out on Monday, they got busy and wasn’t able to ship the package out so he got back with me that evening and upgraded my shipping for free and shipped out the next day, only because he told me he’d make sure I’d have them by the weekend! This company sticks to their word! The customer service from these guys are unmatched and they will have another lifetime customer here!
C
Chris Oct 24, 2025
★ ★ ★ ★ ★ Google
Great product for a good price. Customer service is top notch, I had an issue which was self cause and Core 4x4 helped me out even though it was my own fault. Would definitely recommend and use them again.
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!
NP
Norb Pranger Oct 24, 2025
★ ★ ★ ★ ★ Google
Not sure where to start, Products or Service or Warranty. Products: I found Core4x4 through a very respected YouTuber in the Jeeping community. I purchased an entire set of Core4x4 Control Arms three years ago and have beat the daylights out of them and they are still in great condition. Now, I purchased another Jeep, this time for my daughter and bought yet another set of Control Arms because I know that these things can take a beating and stand up to it. I plan on replacing more parts on this TJ and my JL and will continue to buy from Core4x4. Service: This isn't some huge name conglomerate that treats you like you're just another customer. They are quick with responses and will always make things right should something be a problem. Oh and the quickness in which they ship their products is unmatched. I bought these CAs for my TJ on Thursday, I received them on Monday. Most other manufacturers will tell you weeks, they had them to me in 2 shipping days. Warranty: Seriously, a lifetime warranty? Yes please. Nothing more to say. I can't say enough about how great of a company this is. I've even spoken to the owner through email a few years back on some questions that I had. Support small American built businesses. P.S. Core 4x4, feel free to make me an ambassador and send me some swag :) .
MP
Mirko Pompili Mar 19, 2026
★ ★ ★ ★ ★ Google
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.
RC
Robert C May 27, 2025
★ ★ ★ ★ ★ Google
Fantastic products! Outstanding performance!! Absolutely the best customer service!! You will not be disappointed!
RP
Robin Poole Jul 26, 2025
★ ★ ★ ★ ★ Google
I had several questions before my purchase and Korby helped me with the correct parts to order and recommendations. Outstanding customer service and product knowledge! Can't wait to install them!
MT
Ma TheMeatLoaf Mar 23, 2024
★ ★ ★ ★ ★ Google
Their website estimated 2 days to get my parts but actually took 11. No communication to let me know what’s going on. Parts were missing. Some days they answer questions, some they don’t. Didn’t let me know I’d have to alter stock bolts to fit their parts. All around just seems like they don’t care.
PG
Paul Griffin Feb 21, 2026
★ ★ ★ ★ ★ Google
Great long arm kit with everything else I needed as well! They worked with me to ensure that I was getting an upgraded components kit just like I wanted. Fast shipping with some of the best packaging that I have ever seen. Nothing was scratched or missing and this kit is even more impressive than the videos or website can show. Powder coating looks great with no issues. I would highly recommend CORE 4x4 to anyone looking for a great quality kit.
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!!!

Specifications

Color Black, Blue, Charcoal, Green, LightGreen, Orange, Purple, Red, White, Yellow, Raw Aluminum, Custom Color - Other than what is listed above. Extra charge varies. We will reach out after order is placed.
Vehicle Ram TRX (21–24)
Brand CORE 4X4
Note to Core4x4: -
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