Spec D Aluminum Radiator

1999–2004 Jeep Grand Cherokee 4.0L L6 Engine

Part #: RAD2-GKEE99

Overview

The Spec D Aluminum Radiator is a high-quality cooling solution designed specifically for the 1999 to 2004 Jeep Grand Cherokee equipped with the 4.0L inline-six engine and automatic transmission. Engineered to replace the factory radiator, this unit offers enhanced cooling efficiency to help maintain optimal engine temperatures during daily driving or demanding conditions. Whether you’re restoring your Jeep or upgrading for improved reliability, this radiator delivers dependable performance and durability.

Built to meet or exceed OEM specifications, the Spec D radiator is ideal for Jeep owners seeking a lightweight, corrosion-resistant cooling component that supports engine longevity and consistent operation.

Key Features

This radiator combines advanced materials and thoughtful design to provide superior cooling performance and long-term durability. Key features include:

• Constructed from lightweight, corrosion-resistant aluminum for enhanced heat dissipation
• Two-row core design optimized for maximum cooling efficiency
• Precision-engineered inlet and outlet ports, both measuring 1.5 inches in diameter
• Overall dimensions of 27.37" (L) x 2" (W) x 21.75" (H) ensure a perfect fit
• Direct fit replacement compatible with both automatic and manual transmission models
• Brand new, shipped in original packaging to guarantee quality and protection
• Designed to maintain optimal engine temperature under various driving conditions
• Professional installation recommended to ensure proper fit and function

Construction & Design

The Spec D Aluminum Radiator features a robust two-row core constructed entirely from high-grade aluminum. This material choice offers superior thermal conductivity compared to traditional copper or brass radiators, allowing heat to dissipate more rapidly and efficiently. The lightweight aluminum construction also reduces overall vehicle weight, contributing to improved fuel economy and handling.

Each radiator is precision manufactured to meet strict quality standards, ensuring a reliable seal and leak-free operation. The inlet and outlet ports are sized at 1.5 inches to match factory hose connections, facilitating straightforward installation without modifications.

Installation & Fitment

This radiator is designed as a direct replacement for the Jeep Grand Cherokee models from 1999 through 2004 equipped with the 4.0L inline-six engine. It fits both automatic and manual transmission variants, making it a versatile upgrade or repair part. Installation requires removal of the original radiator and mounting of the Spec D unit using existing brackets and hardware.

While the radiator is engineered for a seamless fit, professional installation is highly recommended to ensure proper coolant flow, secure hose connections, and leak-free operation. Proper installation will help maintain engine cooling performance and prevent overheating issues.

What's Included

• One (1) Spec D Aluminum Radiator, two-row core
• Original packaging for protection during shipping

Ideal For

This radiator is ideal for Jeep Grand Cherokee owners looking to replace a worn or damaged radiator with a durable, high-performance aluminum unit. It suits enthusiasts restoring their vehicle, daily drivers seeking improved cooling reliability, and off-roaders who demand consistent engine temperatures under heavy load conditions. The Spec D radiator offers a cost-effective upgrade that enhances cooling efficiency and vehicle longevity.

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.