Mishimoto Intercooler Kit

2003–2007 Dodge Ram 2500/3500 5.9L Cummins

Part #: MMINT-RAM-03KBK

Overview

The Mishimoto Intercooler Kit is a comprehensive upgrade designed specifically for the 2003 to 2007 Dodge Ram 2500 and 3500 equipped with the 5.9L Cummins engine. This performance intercooler kit is engineered to enhance your truck’s efficiency by improving airflow and significantly reducing air-charge temperatures. By lowering intake temperatures, it helps reduce exhaust gas temperatures (EGTs), which supports safer and more reliable operation at any power level. Whether you are running stock power or have extensive modifications, this kit provides the cooling capacity and durability needed to maximize your engine’s performance and longevity.

Key Features

Every component in the Mishimoto Intercooler Kit is designed to optimize airflow and durability for diesel applications. Key features include:

• Mandrel-bent 3.5-inch aluminum intercooler piping polished to a mirror finish for smooth, unrestricted airflow
• Mishimoto silicone boots featuring DuraCore technology for superior resistance to heat, pressure, fuel, and oil
• Constant-tension T-bolt clamps that ensure a secure and consistent seal under high boost conditions
• High-capacity intercooler with cast aluminum end tanks and a bar-and-plate core for maximum cooling efficiency
• Increased core volume to reduce pressure drop and improve engine efficiency
• Durable construction engineered to withstand the rigors of diesel truck use
• Available with a sleek black or silver core finish to match your truck’s style
• Backed by Mishimoto’s lifetime warranty for peace of mind

Construction & Design

The intercooler piping is crafted from mandrel-bent aluminum, which maintains consistent diameter through bends to maximize airflow and minimize turbulence. The polished finish not only looks great but also resists corrosion. The silicone boots incorporate Mishimoto’s proprietary DuraCore technology, a synthetic inner layer that significantly enhances durability against extreme heat, pressure, and exposure to fuel and oil—common challenges in diesel applications. The intercooler itself features robust cast aluminum end tanks paired with a bar-and-plate core design, which is known for superior heat dissipation and structural strength. This combination ensures the kit can handle high boost pressures while delivering cooler, denser air to the engine for improved combustion.

Installation & Fitment

This intercooler kit is a direct fit for 2003–2007 Dodge Ram 2500 and 3500 models equipped with 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 seamless upgrade that improves performance and reliability. Professional installation is recommended to ensure optimal fitment and sealing.

What's Included

• Mishimoto mandrel-bent 3.5-inch aluminum intercooler piping
• Mishimoto silicone boots with DuraCore technology
• Constant-tension T-bolt clamps
• Mishimoto high-capacity intercooler with cast aluminum end tanks and bar-and-plate core
• 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 and reliability. It suits enthusiasts running stock or modified engines who want to reduce intake air temperatures and EGTs, supporting higher power levels and safer operation. Whether you tow heavy loads, haul frequently, or simply want to enhance your truck’s efficiency, this kit delivers durable, long-lasting cooling performance.

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.