Spec D Aluminum Radiator

2003–2009 Dodge Ram 2500 & 3500 5.9L & 6.7L Diesel

Part #: RAD2-RAM3503

Overview

The Spec D Aluminum Radiator (2-Row) is a direct-fit cooling solution designed specifically for Dodge Ram 2500 and 3500 trucks equipped with 5.9L and 6.7L Cummins diesel engines from 2003 through 2009. Engineered to provide superior heat dissipation, this radiator is ideal for diesel truck owners seeking reliable, long-lasting cooling performance under demanding conditions. Whether you’re upgrading your cooling system or replacing a worn-out radiator, the Spec D unit ensures your engine runs cooler and more efficiently.

Built to withstand the rigors of heavy-duty use, this radiator is perfect for daily drivers, work trucks, and enthusiasts who demand consistent engine temperatures for optimal performance and longevity.

Key Features

Designed with precision and durability in mind, the Spec D Aluminum Radiator offers the following key features:

• Constructed from lightweight, corrosion-resistant aluminum for enhanced durability and heat transfer
• 2-row core design that maximizes cooling efficiency while maintaining a compact profile
• Overall dimensions of 37.5" (L) x 2.75" (W) x 29.75" (H) for a perfect fit in factory mounting locations
• Standard 2-inch inlet and outlet ports compatible with OEM hoses
• 16mm x 2mm tube size for optimal coolant flow and heat dissipation
• Direct replacement for factory radiators on specified Dodge Ram diesel models
• Professional installation recommended to ensure proper fitment and performance

Construction & Design

The Spec D radiator is expertly crafted from high-quality aluminum, chosen for its excellent thermal conductivity and resistance to corrosion. The 2-row core design balances cooling capacity with a slim profile, allowing for efficient heat exchange without requiring extensive modifications to the engine bay. Precision-welded joints and robust end tanks ensure structural integrity and leak-free operation even under high pressure and temperature conditions typical of diesel engines.

This radiator’s design focuses on durability and longevity, making it a reliable upgrade or replacement part for Dodge Ram trucks that face heavy workloads or extreme driving environments.

Installation & Fitment

This radiator is engineered as a direct-fit replacement for Dodge Ram 2500 and 3500 models equipped with 5.9L and 6.7L Cummins diesel engines from 2003 to 2009. It installs using existing mounting points and standard hose connections, minimizing installation time and complexity. While the fitment is straightforward, professional installation is recommended to ensure proper coolant system integration and to avoid potential leaks or fitment issues.

No major modifications are required, making it an ideal choice for both professional mechanics and experienced DIY enthusiasts.

What's Included

• One (1) Spec D Aluminum Radiator (2-Row)
• Original packaging for safe transport and storage

Ideal For

This radiator is perfect for Dodge Ram owners who need a dependable cooling solution for their diesel trucks. It suits:

• Owners replacing a damaged or leaking factory radiator
• Diesel truck enthusiasts seeking improved cooling performance
• Work trucks operating under heavy loads or in hot climates
• Anyone requiring a durable, long-lasting radiator designed specifically for Cummins diesel engines

Spec D offers aftermarket lighting and styling components. With an emphasis on appearance upgrades with functional lighting, their products help modernize your vehicle’s lighting and electrical setup for both street and off-road use. If you want brighter output, a cleaner look, and hardware designed for straightforward installs, Spec D is a strong upgrade.