Mishimoto Intercooler Kit

2003–2007 Dodge Ram 2500 / 3500 5.9L Diesel

Part #: MMINT-RAM-03KSL

Overview

The Mishimoto Intercooler Kit is a precision-engineered performance upgrade tailored for the 2003 to 2007 Dodge Ram 2500 and 3500 trucks equipped with the 5.9L Cummins diesel engine. Designed to optimize airflow and significantly reduce intake air temperatures, this kit enhances engine efficiency and reliability under demanding conditions. By delivering cooler, denser air to the combustion chamber, it helps lower exhaust gas temperatures (EGTs) and supports consistent power delivery across all performance levels.

Whether you are towing heavy loads, daily driving, or pursuing high-performance tuning, the Mishimoto Intercooler Kit offers a durable, effective solution to improve thermal management and overall engine performance.

Key Features

This complete intercooler kit combines advanced materials and thoughtful engineering to maximize performance and durability. Key features include:

• Mandrel-bent 3.5-inch aluminum intercooler piping polished to a mirror finish for smooth airflow and minimal restriction
• Mishimoto silicone boots with proprietary DuraCore technology, providing superior resistance to heat, pressure, fuel, and oil exposure
• Constant-tension T-bolt clamps that ensure secure, leak-free connections under all operating conditions
• High-capacity bar-and-plate intercooler core with rugged cast aluminum end tanks for enhanced durability and efficient cooling
• Increased core volume designed to reduce pressure drop and improve engine efficiency
• Complete kit includes all necessary components for a seamless, bolt-on installation
• Available with a sleek silver intercooler core finish to complement your engine bay
• Backed by Mishimoto’s lifetime warranty for long-term peace of mind

Construction & Design

The intercooler piping is crafted from mandrel-bent 3.5-inch aluminum tubing, polished to a mirror finish to minimize turbulence and maximize airflow efficiency. This smooth, unrestricted design allows your engine to breathe easier, especially under heavy load or boost conditions.

Mishimoto’s silicone boots incorporate DuraCore technology, featuring a synthetic inner layer that dramatically improves resistance to heat, pressure, fuel, and oil. This advanced construction prevents leaks and blowouts, extending the lifespan of the boots well beyond standard silicone alternatives.

The intercooler core itself utilizes a robust bar-and-plate design with cast aluminum end tanks engineered to withstand the rigors of heavy-duty use. The increased core volume and optimized flow path reduce pressure drop, helping maintain boost pressure and improve combustion efficiency for better overall performance.

Installation & Fitment

This intercooler kit is a direct-fit upgrade for 2003–2007 Dodge Ram 2500 and 3500 trucks powered by the 5.9L Cummins diesel engine. Installation is straightforward and requires no major modifications, as the kit replaces the factory intercooler and piping with high-quality components designed for a bolt-on fit. All necessary hardware is included to ensure a smooth installation process. Professional installation is recommended to guarantee proper fitment and optimal performance.

What's Included

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

Ideal For

This intercooler kit is ideal for Dodge Ram 2500 and 3500 owners seeking to enhance their 5.9L Cummins diesel’s performance, reliability, and thermal management. It is perfectly suited for enthusiasts who tow heavy loads, run performance tunes, or want to maintain cooler intake air temperatures to extend engine longevity. The kit also appeals to anyone looking for a durable, high-quality intercooler upgrade backed by a comprehensive 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.