The Edelbrock Victor Junior 454-R Intake Manifolds are designed to optimize the flow characteristics of an 850 CFM (Cubic Feet per Minute) standard flange carburetor. This manifold features extended runner dividers, smaller plenum chambers and unique runner design for better 60 feet times and maximum power from 3, 500 to 7, 500 RPM. The intake manifold directs the air or air-fuel mixture from the throttle body to the intake ports in the cylinder head. The flow typically proceeds from the throttle body into a chamber called the plenum, which in turn feeds individual tubes, called runners, leading to each intake port. Victor Junior 454-R will fit the Edelbrock Victor race heads #77609, #77659, Victor Junior #60409 and Victor 24 degree #77409 and #77459.