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2003-2009 Dodge Ram 2500 3500 5.9L, 6.7L Cummins Diesel 3 Row Extruded Tube Aluminum Radiator
$2,185.30
Randy’s Transmissions aluminium radiator to suit the 2003-2009 Dodge Ram 2500 3500 5.9L, 6.7L Cummins 3 Row Extruded Tube Aluminum. Improved cooling capacity to keep temperatures in check under load. Imported to order and backed by the team at Willys Workshop.
Imported to order — through our workshopWe bring this in from our supplier and receive it at our workshop first. From there we can build, tune or fit it for you — or ship it straight to you or your mechanic. Freight and any workshop work are quoted on enquiry.
Available to order
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Willys Workshop · Oxley & Warana, QLD
Easy returns within 14 days
12 Month Warranty
Tuning & Fitment Available
Fast AU-Wide Shipping
Easy returns within 14 days
12 month warranty
Description
The Last Diesel Radiator You’ll Ever Need
Fluidyne Extruded Aluminum Diesel Radiator For 2003 – 2009 Dodge Ram 2500/3500 Diesel & Gas
Sick of cracked, leaking aftermarket radiators? So are we. For decades, diesel truck owners have settled for radiators that simply can’t take the heat. At Fluidyne, we’re putting an end to that — permanently.
Over 30 Years of Proven Performance
For more than three decades, Fluidyne has been a leader in high-performance cooling systems. Our products have powered championship-winning NASCAR teams, extreme off-road builds, and high-horsepower street machines. When it comes to cooling under pressure, nobody does it better.
Now, we’re bringing that same elite-level technology to the diesel world. Our extruded aluminum diesel radiators are engineered from the ground up to outperform and outlast every traditional radiator on the market.
Built with NASCAR-Proven Technology
Our extruded tube core is a single-piece design — not a patchwork of thin, brazed tubes like most aftermarket aluminum radiators. This solid-core construction eliminates the header joint, the #1 failure point in conventional designs. It’s the same technology we use in our official NASCAR oil coolers — and now it’s available for your truck.
Why Fluidyne Radiators Are Different
- Extruded Aluminum Core
Formed from a single piece of aluminum – instead of laser welded flat plate – for unmatched rigidity, heat transfer, and durability.
- Race-Proven Durability
Trusted in NASCAR and now available for diesel trucks that demand race-grade performance.
- Maximum Heat Rejection
The densest core and most aluminum contact surface area in the industry.
- Proprietary Fin Design
Engineered for better airflow, faster heat dissipation, and lower temps under heavy load.
- Thickest Tanks in the Game
Built to handle real diesel stress — from daily towing to sled pulls and high-boost performance.
Compatible with: 2003 – 2009 Dodge Ram 2500/3500 – 5.9/6.7L Diesel & 4.7/5.7/8.0 Gas
Upgrade the Whole System
Pair your Fluidyne radiator with our direct-fit bar-and-plate transmission coolers for complete cooling coverage — ideal for towing, racing, or daily workhorse duty.
Shipped Strong. Delivered Safe.
Each unit ships in a custom heavy-duty box with high-density foam to prevent damage in transit. Yes, our shipping is slightly more — but unlike other brands, we guarantee your radiator arrives ready to install.
Why Choose Fluidyne?
- 30+ Years of Racing Pedigree
- Official NASCAR-licensed Oil Cooler Supplier
- Made with the Most Advanced Materials in the Industry
- Backed by Generations of Performance Engineering
Don’t trust your diesel to a folded-sheet budget radiator. Invest in the same technology trusted at 200+ MPH — built to last a lifetime in your diesel truck.
Imported to Order — Through Our Workshop
- Brought in from our supplier and received at our Sunshine Coast workshop first.
- From there we can build, tune or fit it for you, or ship it on to you or your mechanic.
- Freight and any workshop work are quoted on enquiry — international freight, customs and delivery vary by item and destination.
- Typical lead time is confirmed at the time of order.
Get a freight + build quote: call (07) 5619 7869 or email sales@willysworkshop.com.au.
Additional information
| Weight | 18 kg |
|---|---|
| Dimensions | 90 × 65 × 18 cm |
Randy's Transmissions — Limited Warranty
Randy's Transmissions warrants all reman transmissions, torque converters and serviced components per the published Randy's Limited Warranty:
- 12 months / unlimited km on reman transmissions (street use)
- Lifetime on Randy's hard parts (gears, shafts) where stated
- Claims processed via Randy's Warranty Claims & Support form
- Original proof of purchase required
- Competition / off-road use excluded unless specifically stated
Fitment by Willys Workshop can be arranged in-house at our Oxley or Warana locations — workshop fitment receipts count toward warranty claim documentation.
Read the full Randy's Transmissions warranty terms →
Warranty claims are coordinated through Willys Workshop. Email sales@willysworkshop.com.au or call Warana (07) 5619 7869 / Oxley (07) 3377 3421 with your order number and a description of the issue.
Big purchase? Talk to our diesel team first.
Send your rego or VIN and our Australian-based team will manually confirm fitment before you buy.
Prefer to text your rego/VIN? 0485 885 957
