This manifold is used for GM aluminum oval port heads used on all big-block Chevrolet engines with large oval port heads (1975 and prior), and all aluminum heads with oval ports. This manifold includes the latest design in dual-plane manifolds and ha ... more info

This manifold is the same as P/N 12363406 except it has been "CNC" port matched for GM aluminum oval port heads used on all big-block Chevrolet engines with large oval port heads (1975 and prior), and all aluminum heads with oval ports. This manifold ... more info

This high rise intake manifold (spread bore with dual bolt pattern) is designed for all big-block Chevrolet 396/502ci engines with our current oval port aluminum heads for 1975 and earlier large oval port iron heads. This is the latest in design and ... more info

This high rise intake manifold (spread bore with dual bolt pattern) is designed for all big-block Chevrolet 396/502ci engines with our current oval port aluminum heads for 1975 and earlier large oval port iron heads. This manifold is the same as P/N ... more info