Fleece Coolant Bypass Kit (FPE-CLNTBYPS-19)

The Fleece Coolant Bypass Kit is engineered for 2019–2022 Dodge Ram 2500/3500 trucks equipped with the 6.7 L Cummins engine. This seamlessly integrated, OEM-style kit improves coolant flow to the rear cylinders—which are prone to overheating—and prevents excessive pressure buildup in the cooling system. It adds a secondary thermostat that activates based on temperature rather than pressure, maintaining consistent cooling across all cylinders and helping avoid blown freeze plugs or internal failures.  Features: Increases coolant flow and decreases coolant temperatures at the rear cylinders Ensures consistent temperatures across all six cylinders  Prevents damaging coolant pressure buildup  Secondary thermostat operates based on temperature trigger  Complete kit includes braided hose with AN‑O‑ring fittings for a leak-free installation  Easily installs without fuel tank or system modifications Provides factory-level fit and finish  Kit Includes: Rear coolant bypass thermostat