A manifold assembly for a gas turbine engine comprising: a mounting plate having a mount interface configured for attachment to a housing, characterized by further comprising: a flow plate attached to the mounting plate to provide at least one flow passage therebetween, wherein the flow plate comprises a ring-shaped structure with a center opening defining a center axis and a first ring portion defined by a first inner peripheral surface extending circumferentially about the axis and a first outer peripheral surface spaced radially outwardly relative to the first inner peripheral surface; wherein the mounting plate comprises a ring-shaped structure with a center opening concentric with the center axis and a second ring portion defined by a second inner peripheral surface extending circumferentially about the axis and a second outer peripheral surface spaced radially outwardly relative to the second inner peripheral surface; and wherein the at least one flow passage comprises at least a first flow passage formed adjacent to the first and second inner peripheral surfaces and a second flow passage formed adjacent to the first and second outer peripheral surfaces, the first and second flow passages (72a, 72b) extending circumferentially around the first and second ring portions to at least partially surround the central axis. a mounting plate having a mount interface configured for attachment to a housing, characterized by further comprising: a flow plate attached to the mounting plate to provide at least one flow passage therebetween, wherein the flow plate comprises a ring-shaped structure with a center opening defining a center axis and a first ring portion defined by a first inner peripheral surface extending circumferentially about the axis and a first outer peripheral surface spaced radially outwardly relative to the first inner peripheral surface; wherein the mounting plate comprises a ring-shaped structure with a center opening concentric with the center axis and a second ring portion defined by a second inner peripheral surface extending circumferentially about the axis and a second outer peripheral surface spaced radially outwardly relative to the second inner peripheral surface; and wherein the at least one flow passage comprises at least a first flow passage formed adjacent to the first and second inner peripheral surfaces and a second flow passage formed adjacent to the first and second outer peripheral surfaces, the first and second flow passages (72a, 72b) extending circumferentially around the first and second ring portions to at least partially surround the central axis. a flow plate attached to the mounting plate to provide at least one flow passage therebetween, wherein the flow plate comprises a ring-shaped structure with a center opening defining a center axis and a first ring portion defined by a first inner peripheral surface extending circumferentially about the axis and a first outer peripheral surface spaced radially outwardly relative to the first inner peripheral surface; wherein the mounting plate comprises a ring-shaped structure with a center opening concentric with the center axis and a second ring portion defined by a second inner peripheral surface extending circumferentially about the axis and a second outer peripheral surface spaced radially outwardly relative to the second inner peripheral surface; and wherein the at least one flow passage comprises at least a first flow passage formed adjacent to the first and second inner peripheral surfaces and a second flow passage formed adjacent to the first and second outer peripheral surfaces, the first and second flow passages (72a, 72b) extending circumferentially around the first and second ring portions to at least partially surround the central axis.