STAGE 1 Cylinder Head - GM 6.6L Duramax 2004.5-2005 LLY (110100012)
CUSTOM BUILDS AVAILABLE. CALL US ON +1 (714) 985 - 4825 TO DISCUSS YOUR PROJECT NEEDS BEFORE PLACING ORDER.
These heads have a 5 angle valve job, are 5 axis CNC ported including radiusing the intake ports, and include titanium retainers, new spring cup bases, beehive valve springs with higher spring pressure, and new valve stem seals. These flow 35 CFM more than stock heads on the intake and exhaust ports.