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Enhanced Cooling for High-Performance Cummins Engines

The factory cooling system on the 2003-2012 Cummins engine was designed for stock horsepower levels. When you add performance modifications, the cooling system often fails to keep up, particularly at the back of the cylinder head. The Fleece Performance Coolant Bypass Kit is the ultimate solution for managing temperatures in modified 5.9L and 6.7L Cummins engines.

Why Choose This Bypass Kit?

• Specifically designed for manual transmission applications
• Optimizes coolant flow to the rear of the cylinder head
• Prevents coolant stagnation and localized overheating
• Essential for trucks with increased horsepower and towing capacity
• Includes high-quality components for a seamless fit
• CARB EO: D-834-9 compliant

By allowing coolant to bypass the restrictive thermostat housing, this kit improves overall circulation and helps maintain stable engine temperatures under extreme stress. This is a critical upgrade for any enthusiast pushing their truck beyond factory specifications. Don't let heat compromise your engine's reliability; install the Fleece Performance bypass kit to ensure your Cummins runs cooler and lasts longer. Trust in the quality and engineering excellence provided by GGCRACING.