Edelbrock 2921 Victor Junior Aluminum Intake Manifold Victor junior has no rear water crossover Intake style is single plane and carburetor quantity is single Basic operating RPM range is from 3,500 to 8,000 RPM Extra material for port matching and customizing to maximize engine performance Port exit size at cylinder head is 1.90 x 1.08 with enough extra material to open it up to 2.10 x 1.18