Mishimoto Intercooler Kit

2003–2007 Dodge Ram 2500 / 3500 5.9L Diesel

Part #: MMINT-RAM-03KBK

Overview

The Mishimoto Intercooler Kit is a precision-engineered performance upgrade tailored for the 2003 to 2007 Dodge Ram 2500 and 3500 models equipped with the 5.9L Cummins diesel engine. Designed to optimize your truck’s efficiency, this kit significantly improves airflow and reduces intake air temperatures, which in turn lowers exhaust gas temperatures (EGTs). By maintaining cooler intake air, the intercooler kit enhances combustion efficiency, supports safer engine operation, and extends the longevity of your diesel powerplant.

Whether you are running a stock setup or have made extensive modifications, this intercooler kit delivers the cooling capacity and durability necessary to maximize power output and reliability. It is an ideal upgrade for diesel enthusiasts seeking improved performance, especially under heavy towing or demanding driving conditions.

Key Features

Every component in the Mishimoto Intercooler Kit is engineered to optimize airflow, durability, and heat dissipation specifically for diesel applications. Key features include:

• Mandrel-bent 3.5-inch aluminum intercooler piping polished to a mirror finish for smooth, unrestricted airflow and corrosion resistance
• Mishimoto silicone boots with proprietary DuraCore technology, providing superior resistance to heat, pressure, fuel, and oil exposure
• Constant-tension T-bolt clamps that ensure a secure, leak-free seal under high boost conditions
• High-capacity intercooler featuring cast aluminum end tanks and a bar-and-plate core for maximum cooling efficiency and structural strength
• Increased core volume designed to reduce pressure drop and improve overall engine efficiency
• Durable construction engineered to withstand the rigorous demands of diesel truck use
• Available with a sleek black core finish to complement your truck’s appearance
• Backed by Mishimoto’s lifetime warranty for long-term peace of mind

Construction & Design

The intercooler piping is crafted from mandrel-bent aluminum, maintaining a consistent diameter through bends to maximize airflow and minimize turbulence. Its polished finish not only enhances visual appeal but also provides excellent corrosion resistance, ensuring long-lasting performance.

Mishimoto’s DuraCore silicone boots incorporate a synthetic inner layer that significantly improves durability against extreme heat, pressure, and exposure to fuel and oil—common challenges in diesel applications. This technology helps maintain reliable sealing and flexibility under demanding conditions.

The intercooler itself features robust cast aluminum end tanks paired with a bar-and-plate core design. This combination is renowned for superior heat dissipation and structural integrity, allowing the intercooler to handle high boost pressures while delivering cooler, denser air to the engine for improved combustion efficiency.

Installation & Fitment

This intercooler kit is a direct bolt-on upgrade for 2003–2007 Dodge Ram 2500 and 3500 trucks equipped with the 5.9L Cummins diesel engine. Installation is straightforward and includes all necessary components, requiring no major modifications or custom fabrication. The kit replaces the factory intercooler and piping, providing a seamless performance enhancement.

Professional installation is recommended to ensure optimal fitment, proper sealing, and to maximize the benefits of the upgrade.

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 perfect for Dodge Ram 2500 and 3500 owners who want to enhance their 5.9L Cummins diesel’s performance and reliability. It suits enthusiasts running stock or modified engines who seek to reduce intake air temperatures and exhaust gas temperatures, enabling higher power levels and safer operation. Whether you tow heavy loads, haul frequently, or simply want to improve your truck’s efficiency and durability, this kit delivers dependable, 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.