Engine - Cylinder Heads - Aluminum Cylinder Head, NHRA Legal

From GM Performance - This new aluminum cylinder head is a replacement for the 1969 L88 head P/N 14011076 used on 1969 Camaro and 1968-71 Corvette vehicles. This head is similar to P/N 12363410 except that the intake ports are a cast, not CNC'd. The valve seats can be machined to 2.19 inch intake and 1.88 inch exhaust or larger. The rectangular port intake volume is 315cc, with square exhaust ports. The combustion chamber is 118cc and the valve guides start at 11/32 inch, but can be machined to 3/8 inch.