Description: A NHRA legal head for your Stock or Super Stock car. These GM Performance Parts NHRA legal aluminum cylinder heads are designed as direct replacements for 1969 L88 heads (P/N 14011076). They use intake ports that are as cast, not CNC-machined. The valve seats can be machined to 2.19 in. intake and 1.88 in. exhaust diameters or larger. The rectangular port(more)

Description: A NHRA legal head for your Stock or Super Stock car. These GM Performance Parts NHRA legal aluminum cylinder heads are designed as direct replacements for 1969 L88 heads (P/N 14011076). They use intake ports that are as cast, not CNC-machined. The valve seats can be machined to 2.19 in. intake and 1.88 in. exhaust diameters 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 in. diameters. Their casting number is 12363401. (minimize)