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Part #: MIMMRAD-RAM-03

Mishimoto Aluminum Performance Radiator MMRAD-RAM-03

2003-2009 Dodge Ram 2500/3500 5.9L/6.7L Cummins
Part #: MIMMRAD-RAM-03
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Mishimoto has developed an aluminum performance radiator for the Dodge Ram 2500 with a 5.9L or 6.7L Cummins Engine. The Mishimoto performance aluminum radiator for the Dodge Ram is the ideal upgrade to the stock radiator. Designed and engineered to maximize cooling efficiency by up to 30%, boost engine functions and protect your truck from overheating. Whether you use your Dodge Ram for daily driving or as a powerhouse for hauling and towing, you don't want to overlook the importance of installing an upgraded radiator for your engine. A stock radiator can not handle the heat that comes along with having a great deal of horsepower. The Mishimoto Dodge Ram radiator features a lightweight two-row core made of 100% brazed aluminum and polished end tanks. Every Mishimoto Performance Radiator is a direct OEM fit, making installation effortless with no cutting or modification required.

  • Direct OEM Replacement
  • No Cutting or Modification required
  • up to 30% better cooling


  • Mishimoto Radiator
  • Mishimoto Radiator Cap
  • Magnetic Drain Plug
  • Limited Lifetime Warranty

Tech Specs:

  • Overall Size: 35.5" x 30.5" x 5.63"
  • Core Size: 27.0" x 28.1"
  • Rows: 2
  • Inlet:1.97"
  • Outlet: 1.97"
  • Core Thickness: 1.34"
  • Tank Wall Thickness: .08"
  • Fill Neck: 1.22"
  • Drain Plug Thread Size: M12 x 1.5"
  • Drain Plug Thread Length: .47"


03-09 Dodge Ram 2500/3500 5.9L/6.7L Cummins
07.5-09 Dodge Cab & Chassis 6.7L Cummins 

Mishimoto Performance (MP), warrants all of its products under its 'no questions asked' limited lifetime warranty policy. Regardless of the defect in product, Mishimoto will replace the original product. Warranty claims must be accompanied by the original sales receipt from an authorized dealer.
A trained professional should install all MP products. Any issues with compatibility or installation should be addressed before attempting to install the product.The purchaser's remedy for breach of this limited warranty, exclusive of all other remedies provided by law, is expressly limited to repair or replacement of any part or parts. All products returned for warranty consideration must be returned to MP with all transportation expenses prepaid.
MP shall not be responsible for damages to its products or injury to persons using the products in any manner that would constitute improper operation, including but not limited to: incorrect opening of radiator pressure caps, burst hoses, unintended application or usage not intended by MP, negligence, improper installation, or any other use that may cause damages or injury. MP shall not be responsible for injury or harm to persons or property when caused by persons or vehicles using its products.

Accident Protection

Mishimoto, under its no questions asked warranty policy, will provide a warranty for all claims including vehicles involved in accidents. Warranty claims must include pictures of the accident and an official police report, and must be within three months of the accident.

For all warranty claims, please contact Mishimoto.



  • MFG. Number MMRAD-RAM-03
  • Manufacturer Name Mishimoto
  • Shipping Weight 20.00 lb.
  • Shipping Length 8 in.
  • Shipping Width 33 in.
  • Shipping Height 40 in.
  • UPC 748354810356
  • Warranty Yes
  • Warranty Info Limited Lifetime


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Questions and Answers

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Most Popular Questions

Does Mishimoto offer a 3 or 4 row radiator?
View Staff Answer 

More is better, right? Not necessarily. In the old days of copper brass radiators this was true because the width of the tubes rarely changed. Copper tubes measured about 7/16" (.437") wide and the more rows you have, the better the surface area in contact with the fin and consequently the more heat rejection. Now a days, the U.S. standard for aluminum radiator tubes is a 1.0" wide tube. So your typcial 2-Row aluminum radiator core has a total of 2.0" tube-to fin contact area per row versus 1.7" of a typical 4-row copper unit.

All Mishimoto radiators are made with either two or three rows of high-quality aluminum, which allows all parts of the radiator, including the tanks, to dissipate heat. Also, the cooling fins are designed for maximum heat dissipation. The coolant tubes on Mishimoto radiators have greater surface areas for improved cooling over stock OEM radiators. Additionally, Mishimoto radiators have more coolant capacity than OEM applications.

Can a Flex-a-lite Fan be used on this radiator?
View Staff Answer 

The Mishimoto Aluminum Performance Radiator MMRAD-RAM-03 is designed as a direct fit of the factory radiator therefore a Flex-a-lite fan will work with this radiator with no problem.


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