ALUM340 FULL PORT OVAL AS

The Dart Race Series Big Block Heads (Part Number 16777116) are designed to provide superior performance without the need for extensive welding and modifying of stock castings. These heads incorporate proven Pro Stock technology, offering improved performance while maintaining compatibility with most off-the-shelf pistons, manifolds, headers, and valve train components. They are cast from premium 355-T61 aerospace aluminum alloy for superior strength and integrity. Key features include 24-degree valve angles (rolled two degrees from stock) to reduce chamber volume and improve flow, heart-shaped 119cc or 139cc combustion chambers for improved efficiency and increased power, and interlocking ductile iron valve seats compatible with stainless steel and titanium valves.