Fleece Performance FPE-CLNTBYPS-CUMMINS-19 Coolant Bypass Kit for 2019+ Ram 6.7L Cummins

The Fleece Performance Coolant Bypass Kit addresses a critical design flaw in 2019-Present RAM trucks with the 6.7L Cummins engine. The rear cylinders on these engines suffer from insufficient coolant flow, leading to elevated temperatures that can cause excessive pressure buildup and potentially catastrophic freeze plug failures. This patent-pending system provides a proactive solution by adding a secondary thermostat that responds to temperature rather than pressure, preventing damage before it occurs.

Key Features:

• Dual thermostat housing design provides increased coolant flow to rear cylinders
• Temperature-activated secondary thermostat (not pressure-activated like competitor products)
• OEM-quality fit and finish integrates seamlessly with factory cooling system
• Complete kit includes braided nylon coolant hoses with AN O-ring fittings for leak-free installation
• Includes new EGR crossover tube gaskets for proper reinstallation
• All necessary mounting hardware included

Performance Benefits:

• Significantly reduces coolant temperatures at rear cylinders
• Maintains consistent temperature distribution across all six cylinders
• Prevents damaging pressure buildup that leads to freeze plug blow-outs
• Protects both external freeze plugs and smaller diameter plugs under valve cover
• Improves overall engine reliability and longevity

What's Included:

• Rear coolant bypass thermostat housing
• Front coolant bypass thermostat housing
• Black braided nylon coolant bypass hose with AN fittings
• EGR crossover tube gaskets
• Complete mounting hardware

This coolant bypass kit is one of the most important upgrades for the 6.7L Cummins platform, especially for trucks used for towing, performance applications, or operating in warm climates. Backed by a 1-year limited parts warranty.