12629063 - LS3 Cylinder Head Assembly

• Aluminum performance head
• Fits any LS family engine with 4.000" bore or larger
• 2.165" hollow stem intake, and 1.590" solid stem exhaust valves
• .550" max valve lift
• As-cast L92 style intake ports
• D-shaped exhaust ports
• As-cast combustion chambers
• Uses bare head P/n 12629051