Mishimoto Intercooler

2003–2009 Dodge / RAM 2500/3500 5.9L/6.7L Cummins

Part #: MMINT-RAM-03SL

Overview

The Mishimoto Intercooler is engineered specifically for the 2003 to 2009 Dodge and RAM 2500/3500 trucks equipped with the 5.9L and 6.7L Cummins inline-6 engines. Known for their durability and smooth power delivery, these Cummins engines benefit greatly from enhanced intake cooling and airflow. This intercooler is designed to lower intake air temperatures, reduce pressure loss, and improve overall engine efficiency, making it an ideal upgrade for both stock and modified trucks.

Whether you are looking to maintain your truck’s reliability or push your performance limits, the Mishimoto intercooler offers a robust solution that supports higher boost pressures and helps lower exhaust gas temperatures (EGTs), contributing to improved engine longevity and power consistency.

Key Features

This intercooler combines advanced engineering with durable materials to deliver superior performance and reliability. Key features include:

• Robust cast aluminum end tanks for enhanced strength and durability
• Dense bar-and-plate core design that maximizes cooling efficiency and airflow
• Increased core volume to support substantial boost pressures and reduce intake temperatures
• Larger outlet ports compared to factory units for improved airflow and reduced pressure drop
• Two silicone boots featuring Mishimoto’s DuraCore technology for superior resistance to heat, pressure, fuel, and oil
• Signature constant-tension T-bolt clamps ensuring consistent and durable holding power
• Available in silver finish to complement your engine bay aesthetics
• Backed by Mishimoto’s lifetime warranty for long-term peace of mind

Construction & Design

The Mishimoto intercooler is built with high-quality cast aluminum end tanks that provide exceptional strength and resist cracking under high boost conditions. The core utilizes a dense bar-and-plate design, which is proven to offer superior heat dissipation and airflow compared to traditional tube-and-fin cores. This design choice ensures that intake air temperatures are minimized, which is critical for maintaining engine performance and preventing detonation.

The intercooler’s larger core volume and outlet ports are engineered to reduce pressure loss, allowing your turbocharger to operate more efficiently. The included silicone boots are constructed with DuraCore technology, a synthetic inner layer that significantly improves resistance to extreme heat, pressure, and exposure to fuel and oil, extending the life of the boots and preventing leaks or blowouts.

Installation & Fitment

The Mishimoto intercooler is a direct-fit replacement designed specifically for the 2003–2009 Dodge and RAM 2500/3500 trucks with 5.9L and 6.7L Cummins engines. Installation is straightforward and requires no permanent modifications to your vehicle. The package includes all necessary silicone boots and clamps, allowing for a seamless swap with the factory intercooler. This makes it an excellent upgrade for enthusiasts seeking improved performance without the hassle of custom fabrication.

What's Included

• Mishimoto cast aluminum intercooler core with end tanks
• Two DuraCore silicone boots
• Two constant-tension T-bolt clamps
• Installation hardware and instructions

Ideal For

This intercooler is perfect for Dodge and RAM 2500/3500 owners who want to enhance the performance and reliability of their 5.9L or 6.7L Cummins engines. It is especially suited for those running stock or moderately modified trucks who require better cooling efficiency to support higher boost levels and reduce engine temperatures during towing, hauling, or off-road use. Additionally, it appeals to enthusiasts seeking a durable, long-lasting intercooler upgrade backed by a lifetime warranty.

Mishimoto is a performance cooling brand offering aluminum radiators, intercoolers, oil coolers, hoses, and supporting hardware built to manage heat on hard-driven street and track vehicles. For boosted setups and towing/off-road rigs alike, Mishimoto upgrades are designed to increase cooling capacity and reliability where factory systems can become a limitation.