Description

Keep your Dodge Ram Cummins engine running cooler, stronger, and longer with this high-performance Coolant Bypass Kit . Designed for 2003–2007 5.9L Cummins (manual only) and 2007.5–2018 6.7L Cummins (manual & automatic) , this upgrade prevents one of the most common Cummins issues— rear cylinder overheating and coolant pressure build-up . The rear cylinders on Cummins engines receive less coolant flow, leading to hot spots, excessive pressure, and blown freeze plugs . This premium aluminum and braided hose kit solves that problem by adding a secondary thermostat that regulates flow by temperature, not pressure. The result? Consistent cooling across all cylinders, reduced stress on the block, and improved long-term reliability . With durable materials, AN O-ring fittings for a leak-free seal , and everything needed for installation, this kit is built to withstand high performance demands—whether you tow heavy loads, daily drive, or push your Cummins hard. ✅ Lower rear cylinder temps ✅ Prevent coolant pressure spikes & freeze plug failure ✅ Ensure consistent cooling across all six cylinders ✅ Built tough with braided hose & aluminum housing ✅ Easy installation with included hardware Upgrade your Cummins with confidence—this coolant bypass kit is one of the most important investments you can make in your engine’s longevity.