VP Coolant Bypass Kit 1998.5-2002 Fleece 2015 CP3 upgrade proven to support

CP3 upgrade proven to support 750 RWHP with the proper complimenting modifications

The D-Max Flow Enhancer has been designed to provide your Duramax engine with a constant 8 PSI fuel pressure

more power possible with larger CP3

higher boost and more power

Mechanical fuel pump block off plate (FPE-CUMM-FBOP)

VP Coolant Bypass Kit 1998.5-2002 Fleece 2015 CP3 upgrade proven to supportIncreased 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