Fleece Performance Coolant Bypass Kit for 2003-2007 Dodge Ram 2500/3500 Manual Trans (5.9L / 6.7L)

Fits 2003-2007 Dodge Ram 2500 and 3500 models equipped with a manual transmission (5.9L / 6.7L Cummins).

The rear cylinders on the 5.9L and 6.7L Cummins engines frequently suffer from inadequate coolant flow, leading to significantly higher temperatures at the back of the block. This thermal imbalance creates excessive pressure that can blow out freeze plugs externally or smaller plugs located under the valve cover, often resulting in catastrophic engine failure. The Fleece Performance Coolant Bypass Kit is a critical reliability upgrade designed to normalize temperatures across all six cylinders.

Unlike other bypass kits that operate solely on pressure, this system utilizes a secondary thermostat that opens based on coolant temperature. This proactive approach ensures consistent flow and prevents pressure spikes before they can damage your engine components. The kit is built for long-term durability with high-quality materials to ensure a leak-free installation.

• Lowers coolant temperatures at the vulnerable rear cylinders
• Ensures consistent thermal management across the entire engine block
• Prevents damaging coolant pressure buildup and freeze plug failure
• Includes high-quality braided hose and AN O-ring fittings for a secure seal
• Secondary thermostat-controlled operation for precise cooling
• Manufacturer Part Number: FPE-CLNTBYPS-CUMMINS-MAN