2001-2004 GM w/ 1000-2000 Series Allison Transmission Converter Flow Valve 0.689 Cup End PPE Diesel Air Intake Resonator Delete Plate|Performance Internal Oil Cooler Delete Kit

Internal Oil Cooler Delete Kit

This means lower EGTs

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D-701-38) The OEM Duramax cast-aluminum cylinder heads fall short over time - the different heat expansion rates between cast-iron engine block and cast-aluminum cylinder head cause head gasket scrubbing and eventually blown head gaskets

Excellent mileage and smoke control

2001-2004 GM w/ 1000-2000 Series Allison Transmission Converter Flow Valve 0.689 Cup End PPE Diesel Air Intake Resonator Delete Plate|Performance Internal Oil Cooler Delete KitConverter Flow Valve 0. 689 cup end 2001 04 GM Allison 1000 and 2000 Series