Sierra High Performance Cylinder Head
Sierra High Performance Cylinder Head. Up to 60 HP increase over OE cylinder heads 185cc intake runner/ 62cc exhaust runner 72cc combustion chambers 2.02 intake/1.60 exhaust stainless steel valves 5 angle valve seat cut Double drilled intake mounting for either standard 12 bolt GM intake or late model 8 bolt Vortec intake Accepts both perimeter or center bolt valve covers Fits 5.7 & 6.2L small block GM V-8 applications Cast Iron Corrosion resistance heavy-duty cast iron castings suitable for saltwater usage
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