Fits: 2004.5 thru 2005 Chevy Silverado/GMC Sierra 2500HD/3500HD LLY Duramax Diesel 

Introducing the Freedom Series cylinder heads for the 6.6L Duramax! Give new life to your Duramax with our fully re-manufactured cylinder heads. Each cylinder head is re-manufactured in our state-of-the-art Freedom Racing Engine shop and guaranteed to meet or exceed factory specifications. All heads are meticulously cleaned, inspected, pressure and leak tested, decked, and are equipped with new valve guides, springs, and valve seals.  Perfect for the daily driver or towing application.  Utilizes stock valves with a 45 degree angle on the intake and exhaust. 

Features:

• New casting
• New valve guides, new springs, and new valve seals
• Pressure and leak tested
• Precision ground stock valves with a 45 degree angle
• Multi-angle valve job

Includes:

• Passenger Side Cylinder Head

Notes: 

• We recommend using GM 12637788 head gasket (Grade C, Right) and GM 12637785 head gasket (Grade C, Left)

Install Instructions