Abstract: An intake manifold with vacuum storage for a vehicle engine defined by an integrally formed enclosure assembly for the manifold and for the vacuum storage. The intake manifold portion of the enclosure assembly defines a plenum space and a plurality of branch runners fluidly connected to an air inlet for providing air flow into the associated engine. The vacuum storage portion of the enclosure assembly defines a storage space for vacuum. A passageway extends between the plenum space and the vacuum storage space and a check valve is provided therein to allow air flow from the vacuum storage space into the plenum space to block air flow from the plenum space into the vacuum storage space.