Arizona Speed and Marine provides this large port intake manifold with long runner lengths to provide a broad torque curve. It fits large port heads and has the fuel injectors located in a position aimed at the intake valve to keep the fuel in suspension to the intake valve.
It has fuel rails that mount on the manifold and typically uses AS&M 58 MM throttle valve that flows 1,050 CFM but the plenum chamber opening can be enlarged to fit AS&M Monoblade throttle valve that flows 1,300 CFM.
(Throttle valve not included)
Unlike the Ramjet 502 manifold it is 1″ lower, and has a long radius runner instead of a short runner length and small intake port.
This manifold has been used by GM Powertrain and Mercury Racing modified to fit their specifications..