Duramax Manual Fan Hub Conversion 2001-2010 LB7 LLY LBZ LMM 6.6L

A must have upgrade for your Duramax puller! This fixed fan hub will eliminate your OE viscous fan clutch and increase your intercooler efficiency. Early testing shows considerable decreases in intake air temps and coolant temps, both of which equate to more power. Testing, fitment trials and data collections are happening as we speak and will become available as they are validated. 

Fitment:

• Replaces AC Delco 15-4964 2001-2005 LB7 LLY Fan Clutches
• Replaces AC Delco 15-4986 2006-2010 LBZ LMM Fan Clutches
• Works with AC Delco 15-80690 2001-2005 Cooling Fan
• Works with AC Delco 15-40146 2006-2010 Cooling Fan
• DHD's dual pattern flange allows the use of 2001-2010 cooling fans.
• 2001-2010 Duramax 6.6L LB7, LLY, LBZ, LMM
• Note: Trucks with electronic clutches may require ECM tuning to prevent check engine lights.

Advantages:

• Lower Intake Air Temps
• Lower Engine Coolant Temps
• Lower Transmission Fluid Temps
• Accepts OE Hardware and Fans
• Clear Coated Raw Finish
• Billet 1018 Steel Construction

Disclaimer: This component has not been E.O tested and may impact fuel mileage/efficiency. DHD does not support or encourage the use of this product on licensed, on road vehicles.