Long Arm Upgrade Kit for Dodge Ram 3500 (2003-2007) – D-35-2003-LAK4
Unleash the Full Potential of Your Dodge Ram’s Suspension
Upgrade your 2003-2007 Dodge Ram 3500 with the CORE 4X4 Long Arm Upgrade Kit, designed to provide superior strength, stability, and suspension travel. Factory short arms limit articulation, create a harsh ride, and reduce control under extreme conditions. Our true 4-link long arm design corrects suspension geometry, allowing smoother suspension cycling, better axle control, and a more comfortable ride. Whether you’re conquering rocky terrain or hauling heavy loads, this bolt-on kit enhances both on-road drivability and off-road capability.
What’s Included?
Upper long arms – heavy-duty DOM tubing
Lower long arms – heavy-duty DOM tubing
Precision-cut 3/16” plate steel mounting brackets
All necessary hardware for installation
Key Features and Benefits
Optimized suspension travel & true 4-link design – longer control arms reduce suspension bind, creating a smoother ride, better axle control, and improved handling. The upper control arms feature inward bends for larger tire clearance and maximum articulation.
Heavy-duty DOM tubing & precision-steel brackets – built from 1.75” OD upper arms and 2.25” OD lower arms, paired with 3/16” precision-cut plate steel brackets for extreme durability. Rock Jock Johnny Joints at both ends provide maximum articulation, adjustability, and durability for off-road abuse.
Fully adjustable to maintain suspension geometry – compatible with 0–6 inches of lift, keeping the axle centered and suspension geometry correct. Options available for lifts over 6 inches upon request.
Seamless bolt-on installation – no welding required, and integrates seamlessly with the existing factory crossmember. For lifts under 3 inches, minor trimming of body mounts may be necessary for clearance.
Recommended Pairing for a Complete Front-End Solution
Adjustable Front Track Bar – D-35-2003-FTB1 ensures proper front axle alignment and eliminates steering instability when paired with the long arm kit.
Enhanced Ride Quality, Stability, and Performance
Longer control arms create a smoother suspension arc, reducing harsh angles, wheel hop, and suspension bind. This results in better traction, improved comfort, and superior handling whether on the road or off.
Two-Stage Powder Coating for Maximum Durability
Every control arm and bracket undergoes a zinc primer base coat for superior corrosion resistance, followed by a top coat in your choice of 10 colors, ensuring long-term protection and a customized look.
Proudly Made in the USA
All components in our Long Arm Upgrade Kit are manufactured in our Orem, UT facility, with strict quality control to ensure maximum strength, reliability, and longevity.
Effortless Installation
Includes all necessary hardware for a hassle-free installation. With a 100% bolt-on design, there’s no welding required, making it an easy upgrade. For lifts under 3 inches, minor trimming of body mounts may be needed for clearance.
In Conclusion
The CORE 4X4 Long Arm Upgrade Kit for 2003-2007 Dodge Ram 3500 is the ultimate enhancement for your truck’s suspension. With improved articulation, superior ride quality, and unmatched off-road capability, this kit is built for serious performance. Whether you're navigating technical terrain, towing, or daily driving, this upgrade provides maximum durability and control. Upgrade today and experience the next level in suspension performance!
Vehicle Fitment: Dodge Ram 3500 03-07 – Enhances rear axle alignment, ride comfort, and off-road capability by improving articulation, suspension travel, and handling for both daily driving and tough off-road conditions.
CORE Advantage: True 4-link long arm design optimizes suspension travel and axle control, reducing suspension bind and harsh angles, while improving handling, traction, and overall ride quality.
Adjustability: Fully adjustable for 0-6 inches of lift, allowing for optimal axle centering and suspension geometry. Custom solutions available for lifts over 6 inches to accommodate different vehicle setups.
Construction: Built with heavy-duty DOM tubing (1.75” OD upper arms, 2.25” OD lower arms) and precision-cut 3/16” plate steel brackets. Rock Jock Johnny Joints at both ends provide flexibility, adjustability, and durability for off-road conditions.
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
Front Lower Control Arms Built With 2” OD .25” Wall DOM. Forged Johnny Joints on both adjustable ends with 1.25” x 12 TPI - 2.625” long threads.
Front Upper Control Arms Built With 1.75” 5/16” Wall DOM. Forged Johnny Joints on both adjustable ends with 1.25” x 12 TPI - 3.25” long threads.
| Make | Model | Submodel | Years |
|---|---|---|---|
| Ram | 3500 | 2003 - 2007 |
Construction & Materials
Front Lower Control Arms Built With 2” OD .25” Wall DOM. Forged Johnny Joints on both adjustable ends with 1.25” x 12 TPI - 2.625” long threads.
Front Upper Control Arms Built With 1.75” 5/16” Wall DOM. Forged Johnny Joints on both adjustable ends with 1.25” x 12 TPI - 3.25” long threads.
| Vehicle | Ram HD 3500 (03–07) |
| Brand | CORE 4X4 |
| Color | Black or Blue or Charcoal or Green or Light Green 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. |
| Year Range | 03-07 |
| Bracket Color | Color or Black |
| Placement on Vehicle | Front Upper, Front Lower, Front |
| 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, Light Green, Orange, Purple, Red, White, Yellow, Custom Color - Other than what is listed above. Extra charge varies. We will reach out after order is placed. |
| Bracket Color | Color, Black |
| Vehicle | Ram HD 3500 (03–07) |
| Brand | CORE 4X4 |
| Year Range | 03-07 |
| Note to Core4x4: | - |
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