Cummins Coolant Bypass Kit 2006-2007 Auto Trans Fleece Performance 20958-15 2017-2021 Powerstroke 140GPH System Features:

2017-2021 Powerstroke 140GPH System Features:

1 bent and notched Shoulder Bar

Material: 6061 Aluminum

For Modified Engines w/ High Strength Internal Parts

Cummins Coolant Bypass Kit 2006-2007 Auto Trans Fleece Performance 20958-15 2017-2021 Powerstroke 140GPH System Features:Increased Coolant Flow, Decreased Coolant Temperatures The rear cylinders on the 5. 9 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