Mishimoto has released a performance intercooler kit for the 2003-2007 Dodge 5.9L Cummins. This kit includes everything you need to improve airflow, substantially decrease air-charge temperatures, reduce EGTs, and support your truck at any power level. The first key component is the Mishimoto intercooler piping; engineers have maximized airflow by eliminating restrictive bends, allowing for a smooth and unimpeded airflow. The piping is constructed of mandrel bent 3.5 inch aluminum polished to a mirror finish. This kit includes Mishimoto silicone boots with DuraCore technology and constant-tension T-bolt clamps for accurate and consistent holding force. Mishimoto DuraCore technology is the synthetic material that comprises the innermost layer of all Mishimoto silicone diesel boots. Compared to normal silicone, DuraCore provides superior resistance to heat, pressure, fuel, and oil. This effectively increases the life of boots by preventing leaks and blowouts. This package is rounded out with the Mishimoto intercooler featuring extremely durable cast aluminum end tanks and a bar-and-plate core, all designed to provide cool, dense air to your engine. Mishimoto intercooler features an increase in core volume and reduces pressure drop, which results in an overall increase in engine efficiency. All the components in this kit are engineered to last, just like your truck. Offered with either a black or silver core, the Mishimoto 5.9L Cummins intercooler kit is protected by signature lifetime warranty.
Compatible with the 2003–2007 Dodge 5.9L Cummins
Overall Size: 40.3” x 27.6” x 6.2” / Core Size: 27.36” x 25.57” / Core Thickness: 2.76”
Construction: Bar and Plate / Inlet: 3.5” / Outlet: 3.5”
Mandrel-bent polished aluminum intercooler pipes
Mishimoto Lifetime Warranty
Durable Construction Built for Diesel Torque
Mishimoto designs its intercoolers to handle the extreme boost pressures and high exhaust gas temperatures that Cummins engines are known for. The MMINT-RAM-03KSL features:
-
High-strength cast aluminum end tanks for maximum durability.
-
TIG-welded joints for superior sealing and long-term reliability.
-
Precision CNC-machined fittings to ensure perfect fitment.
From daily driving to towing 20,000 pounds up a grade, this intercooler stands up to anything your Ram throws at it.
Bolt-On Installation with OEM Fitment
Mishimoto engineered the MMINT-RAM-03KSL kit as a direct-fit replacement for the 2003–2007 Dodge Ram 2500 and 3500 Cummins 5.9L. It installs directly into the stock mounting locations — no cutting, drilling, or modification required.
The kit includes high-flow intercooler pipes, durable silicone boots, and constant-tension T-bolt clamps to ensure a secure, leak-free setup that’s ready for serious performance. Installation can typically be completed in just a few hours using standard hand tools.
Performance Gains You Can Feel
Upgrading to the Mishimoto Performance Intercooler Kit can result in measurable improvements across the board, including:
-
Reduced intake air temperatures (IATs) for consistent power delivery.
-
Lower EGTs (exhaust gas temperatures) for safer towing and longevity.
-
Improved turbocharger efficiency and quicker spool times.
-
Enhanced durability and airflow compared to the restrictive OEM unit.
These gains make the MMINT-RAM-03KSL one of the most effective bolt-on upgrades for any 5.9L Cummins owner serious about performance.
Sleek Design with a Polished Finish
This model — MMINT-RAM-03KSL — features a sleek silver finish that complements your truck’s rugged aesthetic while resisting corrosion and wear. It’s performance you can see and feel, with the polished look to match.
Mishimoto Quality — Backed by a Lifetime Warranty
Like every Mishimoto product, the MMINT-RAM-03KSL Intercooler Kit is backed by Mishimoto’s Lifetime Warranty, giving you complete peace of mind. Their commitment to craftsmanship and performance means you’re investing in a product that’s designed to last as long as your Cummins engine.
Final Thoughts
Your 2003–2007 Dodge Ram Cummins 5.9L deserves the best — and the Mishimoto MMINT-RAM-03KSL Performance Intercooler Kit delivers it. With increased airflow, reduced intake temperatures, and unmatched durability, this intercooler kit is the ultimate upgrade for diesel enthusiasts who demand power, efficiency, and reliability.
From towing to tuning, Mishimoto ensures your Cummins performs better, runs cooler, and lasts longer — exactly the way it should.
There are no reviews yet.