Description: Designed for big block Chevy 396-502 c.i.d. engines this rectangular port head is constructed from A356 aluminum with a hard anodized finish to protect it from the harsh marine environment. It has 118cc chambers with 1.89 in. inconel exhaust valves for added durability and one-piece stainless steel 2.25 in. intake valves. The large intake and exhaust ports increase flow and(more)

Description: Designed for big block Chevy 396-502 c.i.d. engines this rectangular port head is constructed from A356 aluminum with a hard anodized finish to protect it from the harsh marine environment. It has 118cc chambers with 1.89 in. inconel exhaust valves for added durability and one-piece stainless steel 2.25 in. intake valves. The large intake and exhaust ports increase flow and velocity over stock big block heads. The deck surface and water jackets were specially designed to work with all big block Chevrolet engines. It includes seals valves and top-quality ARP rocker studs.(minimize)