2006-2010 Factory LBZ/LMM Duramax Cylinder Head (Driver Side) Fleece Performance MERCH 4L OE harness uses yellow

4L OE harness uses yellow with violet or green with a brown stripe wires

5-Axis CNC Ported for Increased Flow - Intake flow increased from 155 CFM to 220 CFM for improved efficiency and power

Upgraded BD Valve Body

Crafted with the same commitment to quality

By removing the grid heating element

2006-2010 Factory LBZ/LMM Duramax Cylinder Head (Driver Side) Fleece Performance MERCH 4L OE harness uses yellowIntroducing our Freedom Series cylinder heads for the 6. 6L Duramax! Each cylinder head is manufactured in our state of the art Freedom Racing Engine shop and is guaranteed to meet or exceed factory specifications. All heads are meticulously inspected, pressure and leak tested, and are equipped with new valve guides, springs, and valve seals. Perfect for the daily driver or towing application, these heads utilize stock valves with a 45 degree angle on