Edelbrock part #2790 Torker 308 intake manifold is designed for Holden 253-304-308 c.i.d. V8 engines with Red motor cylinder heads only (with single bolt in center of manifold), will not fit on Blue/Black cylinder head engines. The Torker 308 intake manifold is a single-plane design and is recommended for street high performance and race engines operating between the 2500 to 6500 rpm range where low-end torque is not required. Accepts square-bore carbs only.