This kit includes 2 components, each built and powder-coated in-house.
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.
Vehicle Fitment: RAM TRX 21+ – The ultimate suspension upgrade to unleash your truck's full potential. Dominate the toughest terrains with maximum performance, precision handling, and unrivaled durability in extreme off-road conditions.
CORE Advantage: Built with heavy-duty 7075 aluminum, this set offers exceptional strength, articulation, and axle alignment. The aluminum’s memory allows for flexibility under stress, restoring the original shape and ensuring continued durability without compromising handling.
Adjustability: Fully adjustable while installed, these control arms allow for quick and precise tuning of axle centering, pinion angle, and suspension geometry for high-performance off-roading and heavy towing, ensuring optimal drivability and stability.
Construction: Designed with 2.5” OD 7075 aluminum and 3.0” Rock Jock Johnny Joints, these control arms offer superior strength, flexibility, and shock absorption for intense off-road applications, with a two-stage powder coating for added corrosion resistance and customization.
Two-Stage Powder Coating: Zinc primer base and top coat available in 10 vibrant colors protect against corrosion and allow for personalized styling of your rig.
Warranty and Origin: Proudly manufactured in the United States, our product includes a lifetime warranty on all non-wear items, providing you with confidence and peace of mind in your purchase.
Built With
Rear Upper Control Arms Built With 2.5” 7075 Aluminum Forged Johnny Joints used on both adjustable ends with 1.5” x 12 TPI - 3.67” long threads.
Rear Lower Control Arms Built With 2.5” 7075 Aluminum Forged Johnny Joints used on both adjustable ends with 1.5” x 12 TPI - 3.67” long threads.
| Make | Model | Submodel | Years |
|---|---|---|---|
| Dodge/Ram | TRX | 2021 - 2024 |
Construction & Materials
Rear Lower control arms built with 2.5” 7075 Aluminum. Forged Johnny Joints used on both adjustable ends with 1.5” x 12 TPI - 3.67” long threads.
Rear Upper control arms built with 2.5” 7075 Aluminum. Forged Johnny Joints used on both adjustable ends with 1.5” x 12 TPI - 3.67” long threads.
| 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. |
| Placement on Vehicle | Rear Upper, Rear Lower, Rear |
| Mounting Style | Bolt-On |
Use the vehicle selector on our website to shop by your year, make, and model. On product pages, use the kit builder to select your color, series, lift height, and any add-on options, then add to cart. If you need help, call or email our team.
Standard orders typically ship within 1–3 business days of ordering. Custom color orders take approximately 5–10 business days. Because everything is built in-house, we can turn orders quickly even for custom specifications.
You can reach our team through the contact form on our website, or browse to the Contact Us page. Our team is available to answer pre-sale and technical questions before and after your purchase.
Reviews of Core 4x4
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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