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        Coolant Bypass Kit for 2007.5-2012 Dodge/Ram 2500/3500 with 6.7L Cummins Fleece Performance

        The Fleece Performance coolant bypass for the 2007.5-2012 RAM with 6.7L Cummins seamlessly integrates with your truck for an OE fit-and-finish.

        Fleece Performance
        • Brand: Fleece Performance
        Vehicle Specific
        • $559.99

        The Fleece Performance coolant bypass for the 2007.5-2012 RAM with 6.7L Cummins seamlessly integrates with your truck for an OE fit-and-finish.

        Increased Coolant Flow, Decreased Coolant Temperatures
        The rear cylinders on the 6.7L Cummins suffer from a lack of coolant flow, and therefore, experience the highest coolant temperatures.

        This can cause excessive pressure to build in the cooling system, especially the rear of the block and blow out freeze plugs externally, or the smaller diameter plugs under the valve cover, leading to a failure.

        Our coolant bypass kit adds a secondary thermostat, that unlike other brands, works based on temperature instead of excessive pressure. This solves the problem before pressure becomes an issue by ensuring consistent temperatures across all six cylinders.


        • Lowers coolant temperature at the rear cylinders
        • Ensures consistent temperatures across all cylinders
        • Prevents damaging coolant pressure build up
        • Complete kit comes with braided hose and AN O-ring fittings to ensure a leak-free installation.

        Why do I need a Fleece Coolant Bypass?
        One of the biggest issues on the 6.7L Cummins is the coolant flow problem to the rear cylinders. This can cause catastrophic failure or blow outs of the freeze plugs in an over-temperature/over-pressure condition.

        The Fleece Coolant Bypass is one of the most important additions you make to improve the reliability and longevity of the Cummins platform.
        Kit Includes:

        • Rear coolant bypass thermostat housing
        • Front coolant bypass thermostat housing
        • New EGR cross-over tube gaskets
        • Black braided nylon coolant bypass hose with protective high temperature sleeve and AN fittings
        • Mounting hardware
          • SKU
          • Weight
            8 lbs
          • Barcode
          • Dimensions (L x W x H)
            16 x 13 x 3 in
          • Manufacturer Part #
        • Engine Year
        • Vehicle Type
        • Property 65 Warning
          CALIFORNIA WARNING: Cancer and Reproductive Harm
        • Material
          Braided Nylon
        • Finish
        • Brand
          Fleece Performance
        • Warranty
          1 Year Limited Warranty
        • Country of Origin
        • Sold As
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        Shipping Times

        Most customers will see their parts within 3-5 business days. We will primarily ship with Purolator ground & DHL Express to ensure the fastest shipping possible.

        Please Note: These are only estimates and shipping time may vary depending on your location, out of country and rural locations expect longer wait times.

        Where Do We Ship 

        We will ship our products within Canada and the United States.

        Please Note: There are limitations what can be shipped to the United States.

        Damaged Shipments

        We provide the option to purchase insurance as we are not responsible for any damage while with a courier, we don’t often see issues, but it does happen. If you purchased insurance we will put in a claim, if no insurance was purchased there will be no refunds or exchanges.

        We accept the following payment methods:

        Return Policy

        It happens sometimes we would like to return it. Here are our return rules:

        • Prior to any return you must contact us and get an approval for a  RMA number
        • Product must be unopened and have no damage. 
        • You must pay for the shipping back, please insure so if anything happens you can make a claim, we are not responsible for damage during shipping and is the sole responsibility of the customer.
        • Regular products are subject to a 5% Restocking fee.
        • Items over 50 lbs. or special orders will be subject to a 20% Restocking fee.
        • Electronics & Tuning is a final sale and cannot be returned. 
        • Fitment Type
          Vehicle Specific
        2007DodgeRam 3500
        2007DodgeRam 2500
        2008DodgeRam 3500
        2008DodgeRam 2500
        2009DodgeRam 3500
        2009DodgeRam 2500
        2010DodgeRam 3500
        2010DodgeRam 2500