A gas turbine engine component (22;24) subjected to a flow of high temperature gas flowing axially along an engine centerline C L, the component (22;24) comprising: a wall having first and second wall surfaces (102,104); and a cooling hole (60;106) extending through the wall, the cooling hole comprising: an inlet located at the first wall surface; an outlet located at the second wall surface such that cooling air C flows from the inlet to the outlet; a metering section extending downstream from the inlet wherein the metering section comprises a centerline axis extending from the inlet to the outlet, and wherein the centerline axis of the metering section is oriented at an angle between 50° and 90° relative to the engine centerline C L; and a diffusing section extending from the metering section to the outlet, the diffusion section comprising: a first lobe diverging longitudinally from the metering section and laterally from the centerline and having a first shape; a second lobe generally opposite the first lobe and diverging longitudinally from the metering section and laterally from the centerline and having a second shape different from the first shape; and a transition region positioned between the first and second lobes (124,126), the transition region comprising a downstream end adjacent the outlet, wherein the first shape defines a first flow volume and the second shape defines a second flow volume, and wherein the first lobe is located upstream of the second lobe with respect to the engine centerline CL, characterized in that the first flow volume is larger than the second flow volume. a wall having first and second wall surfaces (102,104); and a cooling hole (60;106) extending through the wall, the cooling hole comprising: an inlet located at the first wall surface; an outlet located at the second wall surface such that cooling air C flows from the inlet to the outlet; a metering section extending downstream from the inlet wherein the metering section comprises a centerline axis extending from the inlet to the outlet, and wherein the centerline axis of the metering section is oriented at an angle between 50° and 90° relative to the engine centerline C L; and a diffusing section extending from the metering section to the outlet, the diffusion section comprising: a first lobe diverging longitudinally from the metering section and laterally from the centerline and having a first shape; a second lobe generally opposite the first lobe and diverging longitudinally from the metering section and laterally from the centerline and having a second shape different from the first shape; and a transition region positioned between the first and second lobes (124,126), the transition region comprising a downstream end adjacent the outlet, an inlet located at the first wall surface; an outlet located at the second wall surface such that cooling air C flows from the inlet to the outlet; a metering section extending downstream from the inlet wherein the metering section comprises a centerline axis extending from the inlet to the outlet, and wherein the centerline axis of the metering section is oriented at an angle between 50° and 90° relative to the engine centerline C L; and a diffusing section extending from the metering section to the outlet, the diffusion section comprising: a first lobe diverging longitudinally from the metering section and laterally from the centerline and having a first shape; a second lobe generally opposite the first lobe and diverging longitudinally from the metering section and laterally from the centerline and having a second shape different from the first shape; and a transition region positioned between the first and second lobes (124,126), the transition region comprising a downstream end adjacent the outlet, a first lobe diverging longitudinally from the metering section and laterally from the centerline and having a first shape; a second lobe generally opposite the first lobe and diverging longitudinally from the metering section and laterally from the centerline and having a second shape different from the first shape; and a transition region positioned between the first and second lobes (124,126), the transition region comprising a downstream end adjacent the outlet, wherein the first shape defines a first flow volume and the second shape defines a second flow volume, and wherein the first lobe is located upstream of the second lobe with respect to the engine centerline CL, characterized in that the first flow volume is larger than the second flow volume.