A turbocharger turbine assembly comprising: a turbine housing that comprises a longitudinal axis, an exhaust inlet , an exhaust volute, an annular exhaust nozzle disposed a radial distance from the longitudinal axis, a shroud portion, a diffuser portion and an exhaust outlet; and a turbine wheel that comprises a hub that comprises a rotational axis aligned with the longitudinal axis of the turbine housing, a backdisk and a nose, wherein the rotational axis defines an axial coordinate (z) in a cylindrical coordinate system that comprises a radial coordinate (r) and an azimuthal coordinate (Q) in a direction of intended rotation about the rotational axis; and blades that extend outwardly from the hub, wherein each of the blades comprises a shroud edge , a leading edge , a trailing edge , a pressure side, and a suction side, wherein the shroud edge comprises a minimum axial coordinate position where the shroud edge meets the leading edge, and a maximum axial coordinate position where the shroud edge meets the trailing edge, and characterized in that , from the minimum axial coordinate position to the maximum axial coordinate position, the shroud edge comprises a decreasing radial coordinate position, and wherein, from the minimum axial coordinate position of the shroud edge to the maximum axial coordinate position of the shroud edge, the shroud portion of the turbine housing comprises a decreasing radial coordinate position. a turbine housing that comprises a longitudinal axis, an exhaust inlet , an exhaust volute, an annular exhaust nozzle disposed a radial distance from the longitudinal axis, a shroud portion, a diffuser portion and an exhaust outlet; and a turbine wheel that comprises a hub that comprises a rotational axis aligned with the longitudinal axis of the turbine housing, a backdisk and a nose, wherein the rotational axis defines an axial coordinate (z) in a cylindrical coordinate system that comprises a radial coordinate (r) and an azimuthal coordinate (Q) in a direction of intended rotation about the rotational axis; and blades that extend outwardly from the hub, wherein each of the blades comprises a shroud edge , a leading edge , a trailing edge , a pressure side, and a suction side, wherein the shroud edge comprises a minimum axial coordinate position where the shroud edge meets the leading edge, and a maximum axial coordinate position where the shroud edge meets the trailing edge, and characterized in that , from the minimum axial coordinate position to the maximum axial coordinate position, the shroud edge comprises a decreasing radial coordinate position, and wherein, from the minimum axial coordinate position of the shroud edge to the maximum axial coordinate position of the shroud edge, the shroud portion of the turbine housing comprises a decreasing radial coordinate position. a shroud edge , a leading edge , a trailing edge , a pressure side, and a suction side, wherein the shroud edge comprises a minimum axial coordinate position where the shroud edge meets the leading edge, and a maximum axial coordinate position where the shroud edge meets the trailing edge, and a minimum axial coordinate position where the shroud edge meets the leading edge, and a maximum axial coordinate position where the shroud edge meets the trailing edge, and characterized in that , from the minimum axial coordinate position to the maximum axial coordinate position, the shroud edge comprises a decreasing radial coordinate position, and wherein, from the minimum axial coordinate position of the shroud edge to the maximum axial coordinate position of the shroud edge, the shroud portion of the turbine housing comprises a decreasing radial coordinate position. <EOS>