Cummins Coolant Bypass Kit 2006-2007 Auto Trans Fleece Performance S&M Emissions Disclaimer:

Emissions Disclaimer:

Fuel filters are specified to be replaced at every other oil change

Part Number: 215312

Part Number: 247-6303

dyno tested to 874rwhp

Cummins Coolant Bypass Kit 2006-2007 Auto Trans Fleece Performance S&M Emissions Disclaimer: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