Mishimoto Intercooler

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

Part #: MMINT-RAM-03BK

Overview

The Mishimoto Intercooler is a high-performance upgrade designed 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 smooth power delivery and exceptional durability, these Cummins engines benefit greatly from improved intake air cooling and airflow efficiency. Mishimoto’s intercooler enhances your truck’s performance by reducing intake air temperatures, increasing airflow, and minimizing pressure loss, which helps support both stock and modified boost levels while lowering exhaust gas temperatures (EGTs).

Built to last as long as your truck, this intercooler is an ideal choice for enthusiasts seeking reliable, consistent performance gains and improved engine longevity under demanding conditions.

Key Features

This intercooler combines advanced engineering and durable materials to deliver superior cooling and airflow performance:

• Robust cast aluminum end tanks for enhanced strength and durability
• Dense bar-and-plate core design for maximum heat dissipation and airflow
• Increased core volume to support higher boost pressures and reduce EGTs
• Larger outlet ports compared to factory units for improved airflow efficiency
• Includes two silicone boots featuring Mishimoto’s DuraCore technology for superior heat, pressure, fuel, and oil resistance
• Signature constant-tension T-bolt clamps ensure secure, leak-free connections
• Available in sleek black finish for a clean, aggressive look
• Backed by Mishimoto’s lifetime warranty for peace of mind

Construction & Design

The Mishimoto intercooler is engineered with durability and performance in mind. Its cast aluminum end tanks provide exceptional strength to withstand high boost pressures and harsh operating environments. The bar-and-plate core is densely packed to maximize surface area, promoting efficient heat transfer and cooler intake air temperatures. This design not only improves power output but also helps protect your engine by lowering intake air temperatures and reducing thermal stress.

The intercooler’s larger outlet ports facilitate smoother airflow compared to stock units, reducing pressure drop and enhancing throttle response. The included silicone boots utilize Mishimoto’s proprietary DuraCore technology, which incorporates a synthetic inner layer that resists heat, pressure, fuel, and oil degradation better than standard silicone. This construction extends the life of the boots and prevents leaks or blowouts under demanding conditions.

Installation & Fitment

The Mishimoto intercooler is a direct-fit replacement designed specifically for 2003–2009 Dodge and RAM 2500/3500 trucks with 5.9L or 6.7L Cummins engines. Installation requires no major modifications and can be completed with basic hand tools. The kit includes all necessary silicone boots and clamps, ensuring a straightforward upgrade process. Whether you’re upgrading a stock truck or enhancing a modified setup, this intercooler integrates seamlessly with your existing turbo and intake piping.

What's Included

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

Ideal For

This intercooler is perfect for Dodge and RAM 2500/3500 owners looking to improve their Cummins diesel engine’s cooling efficiency and overall performance. It suits daily drivers, towing enthusiasts, and off-roaders who demand reliable power and durability. Additionally, it supports modified trucks running higher boost levels, helping to maintain lower intake temperatures and protect engine components under increased load.

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.