A method for making a twin-vaned nozzle ring assembly for a turbine nozzle of a turbocharger, the method comprising the steps of: (a) providing a first side wall as a ring-shaped part, wherein providing the first side wall as a ring-shaped part comprises providing the first side wall to include a plurality of depressed vane receptacles in a face of the first side wall that confronts a distal face of a first vane ring, each said depressed vane receptacle configured to receive a distal end of a respective first vane; (b) providing a second side wall as a ring-shaped part, the second side wall being formed separately from the first side wall; (c) providing a nozzle ring separately from the first and second side walls, wherein the nozzle ring is provided to have the first vane ring comprising the plurality of first vanes circumferentially spaced about a circumference of the nozzle ring and is provided to have a second vane ring comprising a plurality of second vanes circumferentially spaced about the circumference of the nozzle ring, the first and second vane rings being axially spaced and integrally joined to each other, the first vane ring defining a plurality of first vane passages between circumferentially successive first vanes, the second vane ring defining a plurality of second vane passages between circumferentially successive second vanes, wherein each of the first vane passages has a first vane passage entrance and first vane passage exit, wherein each of the second vane passages has a second vane passage entrance and second vane passage exit, wherein the plurality of first vanes are circumferentially offset from the plurality of second vanes, the plurality of first vane passage entrances are axially spaced apart from the plurality of second vane passage entrances, and the plurality of first vane passage exits are radially aligned with and circumferentially interleaved with the plurality of second vane passage exits, and wherein the plurality of first and second vane passages are fluidly isolated from one another by a partition, the partition comprising a generally annular wall, wherein ends of the plurality of first vanes are joined to one face of the partition and ends of the plurality of second vanes are joined to the opposite face of the partition; and (d) joining the first side wall to a distal face of the first vane ring, and joining the second side wall to a distal face of the second vane ring. (a) providing a first side wall as a ring-shaped part, wherein providing the first side wall as a ring-shaped part comprises providing the first side wall to include a plurality of depressed vane receptacles in a face of the first side wall that confronts a distal face of a first vane ring, each said depressed vane receptacle configured to receive a distal end of a respective first vane; (b) providing a second side wall as a ring-shaped part, the second side wall being formed separately from the first side wall; (c) providing a nozzle ring separately from the first and second side walls, wherein the nozzle ring is provided to have the first vane ring comprising the plurality of first vanes circumferentially spaced about a circumference of the nozzle ring and is provided to have a second vane ring comprising a plurality of second vanes circumferentially spaced about the circumference of the nozzle ring, the first and second vane rings being axially spaced and integrally joined to each other, the first vane ring defining a plurality of first vane passages between circumferentially successive first vanes, the second vane ring defining a plurality of second vane passages between circumferentially successive second vanes, wherein each of the first vane passages has a first vane passage entrance and first vane passage exit, wherein each of the second vane passages has a second vane passage entrance and second vane passage exit, wherein the plurality of first vanes are circumferentially offset from the plurality of second vanes, the plurality of first vane passage entrances are axially spaced apart from the plurality of second vane passage entrances, and the plurality of first vane passage exits are radially aligned with and circumferentially interleaved with the plurality of second vane passage exits, and wherein the plurality of first and second vane passages are fluidly isolated from one another by a partition, the partition comprising a generally annular wall, wherein ends of the plurality of first vanes are joined to one face of the partition and ends of the plurality of second vanes are joined to the opposite face of the partition; and (d) joining the first side wall to a distal face of the first vane ring, and joining the second side wall to a distal face of the second vane ring.