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Optimize Your 5.9L Cummins Cooling System

The Fleece Performance Coolant Bypass Kit is a must-have upgrade for any 2003-2005 Dodge Ram 2500 or 3500 equipped with the 5.9L Cummins engine. The factory cooling system was engineered for stock power levels, but as you increase horsepower and torque, the demand on your cooling system skyrockets. This kit effectively manages coolant flow to prevent localized boiling in the rear cylinders, a common issue that can lead to catastrophic engine failure under heavy load.

Why Choose the Fleece Bypass Kit?

• Reduces coolant pressure in the rear of the engine block
• Prevents cylinder head damage and gasket failure
• Maintains consistent engine temperatures under extreme towing
• CARB EO: D-834-9 compliant for emissions legality
• Includes all necessary hardware for a professional installation

By allowing coolant to bypass the thermostat housing, this kit ensures that your engine remains at a stable operating temperature, even when you are pushing your truck to its limits. Whether you are towing heavy loads or competing on the track, this kit provides the thermal management necessary to protect your investment. Designed for durability and performance, it is the ultimate cooling solution for your Cummins-powered truck. Trust GGCRACING for all your high-performance diesel cooling needs.