Mishimoto Intercooler Kit

2003–2007 Dodge Ram 2500/3500 5.9L Cummins

Part #: MMINT-RAM-03KSL

Overview

The Mishimoto Intercooler Kit is a comprehensive performance upgrade designed specifically for the 2003 to 2007 Dodge Ram 2500 and 3500 equipped with the 5.9L Cummins engine. This kit is engineered to enhance your truck’s efficiency by improving airflow and significantly reducing air-charge temperatures. By delivering cooler, denser air to the engine, it helps reduce exhaust gas temperatures (EGTs) and supports reliable power delivery at any performance level. Whether you’re aiming for improved towing capability, daily driving efficiency, or high-performance tuning, this intercooler kit provides a durable and effective solution.

Key Features

Every component in this kit is designed with performance and longevity in mind. Key features include:

• Mandrel-bent 3.5-inch aluminum intercooler piping polished to a mirror finish for maximum airflow and minimal restriction
• Mishimoto silicone boots featuring DuraCore technology for superior resistance to heat, pressure, fuel, and oil
• Constant-tension T-bolt clamps ensuring consistent and secure connections without leaks
• High-capacity bar-and-plate intercooler core with cast aluminum end tanks for durability and efficient cooling
• Increased core volume to reduce pressure drop and improve overall engine efficiency
• Complete kit includes all necessary components for a seamless upgrade
• Available with a sleek silver or black intercooler core finish
• Backed by Mishimoto’s lifetime warranty for peace of mind

Construction & Design

The intercooler piping is crafted from mandrel-bent 3.5-inch aluminum, polished to a mirror finish to reduce turbulence and maximize airflow. This smooth, unrestricted design helps your engine breathe easier under load. The silicone boots incorporate Mishimoto’s proprietary DuraCore technology, a synthetic inner layer that significantly enhances resistance to heat, pressure, fuel, and oil exposure. This advanced material prevents leaks and blowouts, extending the life of the boots far beyond standard silicone alternatives.

The intercooler itself features robust cast aluminum end tanks paired with a bar-and-plate core, engineered to withstand the rigors of heavy-duty use while providing superior cooling performance. The increased core volume and optimized flow path reduce pressure drop, allowing your engine to maintain boost pressure and improve combustion efficiency.

Installation & Fitment

This intercooler kit is designed as a direct fit for 2003–2007 Dodge Ram 2500 and 3500 trucks powered by the 5.9L Cummins engine. Installation is straightforward with all necessary components included, requiring no major modifications. The kit replaces the factory intercooler and piping, providing a bolt-on upgrade that improves performance and reliability. Professional installation is recommended to ensure proper fitment and optimal results.

What's Included

• Mandrel-bent 3.5-inch aluminum intercooler piping (polished finish)
• Mishimoto silicone boots with DuraCore technology
• Constant-tension T-bolt clamps
• Mishimoto bar-and-plate intercooler with cast aluminum end tanks
• All necessary hardware for installation

Ideal For

This intercooler kit is ideal for Dodge Ram 2500 and 3500 owners looking to improve their 5.9L Cummins diesel’s performance, reliability, and thermal management. It suits enthusiasts who tow heavy loads, run performance tunes, or simply want to maintain cooler intake air temperatures for better engine longevity. The kit is also a great choice for anyone seeking a durable, high-quality 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.