A method for investment casting, comprising: positioning a base plate relative to a die; molding a first material between said die and at least a first surface portion of said base plate; securing one or more patterns to said base plate, said one or more patterns comprising a second material; applying one or more coating layers over at least portions of said one or more patterns and at least a portion of said first material; removing said first material through an interior receptacle of a manifold body and said second material through an exterior receptacle of said manifold body, said exterior receptacle of said manifold body being disposed circumferentially about said interior receptacle of said manifold body, to leave one or more shells formed by said coating layers; introducing molten metal to said one or more shells through said interior receptacle of said manifold body; permitting said molten metal to solidify; and destructively removing one or more investment casting molds, wherein said manifold body comprises: a dual wall pour chamber comprising: said interior receptacle, which comprises a first conical shaped wall having an interior surface and an exterior surface, said exterior receptacle, which comprises a second conical shaped wall circumferentially disposed about said interior receptacle and having an interior surface and an exterior surface, wherein said interior surface of said interior receptacle defines in part an aperture, and said exterior surface of said interior receptacle and said interior surface of said exterior receptacle define in part a substantially circular channel, and a plurality of feeder conduits, each extending from said dual wall pour chamber toward an associated one or more of said plurality of mold patterns; and a plurality of vents, each extending from said plurality of mold patterns toward said dual wall pour chamber. positioning a base plate relative to a die; molding a first material between said die and at least a first surface portion of said base plate; securing one or more patterns to said base plate, said one or more patterns comprising a second material; applying one or more coating layers over at least portions of said one or more patterns and at least a portion of said first material; removing said first material through an interior receptacle of a manifold body and said second material through an exterior receptacle of said manifold body, said exterior receptacle of said manifold body being disposed circumferentially about said interior receptacle of said manifold body, to leave one or more shells formed by said coating layers; introducing molten metal to said one or more shells through said interior receptacle of said manifold body; permitting said molten metal to solidify; and destructively removing one or more investment casting molds, wherein said manifold body comprises: a dual wall pour chamber comprising: said interior receptacle, which comprises a first conical shaped wall having an interior surface and an exterior surface, said exterior receptacle, which comprises a second conical shaped wall circumferentially disposed about said interior receptacle and having an interior surface and an exterior surface, wherein said interior surface of said interior receptacle defines in part an aperture, and said exterior surface of said interior receptacle and said interior surface of said exterior receptacle define in part a substantially circular channel, and a plurality of feeder conduits, each extending from said dual wall pour chamber toward an associated one or more of said plurality of mold patterns; and a plurality of vents, each extending from said plurality of mold patterns toward said dual wall pour chamber. a dual wall pour chamber comprising: said interior receptacle, which comprises a first conical shaped wall having an interior surface and an exterior surface, said exterior receptacle, which comprises a second conical shaped wall circumferentially disposed about said interior receptacle and having an interior surface and an exterior surface, wherein said interior surface of said interior receptacle defines in part an aperture, and said exterior surface of said interior receptacle and said interior surface of said exterior receptacle define in part a substantially circular channel, and a plurality of feeder conduits, each extending from said dual wall pour chamber toward an associated one or more of said plurality of mold patterns; and a plurality of vents, each extending from said plurality of mold patterns toward said dual wall pour chamber. said interior receptacle, which comprises a first conical shaped wall having an interior surface and an exterior surface, said exterior receptacle, which comprises a second conical shaped wall circumferentially disposed about said interior receptacle and having an interior surface and an exterior surface, wherein said interior surface of said interior receptacle defines in part an aperture, and said exterior surface of said interior receptacle and said interior surface of said exterior receptacle define in part a substantially circular channel, and a plurality of feeder conduits, each extending from said dual wall pour chamber toward an associated one or more of said plurality of mold patterns; and a plurality of vents, each extending from said plurality of mold patterns toward said dual wall pour chamber.