Cummins Coolant Bypass Kit 2003-2007 Manual Transmission Fleece Performance D&J Precision Heads and Engine Parts 5 percent failure rating with

5 percent failure rating with our motor and a design that implements unique design features you can only get with FASS Diesel Fuel Systems

-Overdrive and Lockup are incorporated into the shifter so you do not need to remove your hand from the shifter while shifting the transmission

Feature improved oiling to the valve stems

Two WH-1006-3R can be purchased to power the FASS Competition Series motors if you do not wish to build a custom wire harness

Offers crystal clear data at your fingertips

Cummins Coolant Bypass Kit 2003-2007 Manual Transmission Fleece Performance D&J Precision Heads and Engine Parts 5 percent failure rating withIncreased 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