A turbocharger, comprising: a turbine (123, 323) comprising a scroll passage (125, 325) comprising at least a first portion (143, 343) near a beginning of the scroll passage (125, 325) and a second portion (145, 345) near an end of the scroll passage (125, 325), a gas outlet extending axially from the scroll passage (125, 325), a turbine wheel (129, 329) comprising one or more blades (131, 331) disposed in the gas outlet, and means for establishing a bypass flow from the first portion (143, 343) into the second portion (145, 345) of the scroll passage (125, 325), wherein the means for establishing the bypass flow comprises a nozzle ring (135, 335) arranged between the scroll passage (125, 325) and the gas outlet, the nozzle ring (135, 335) comprising a plurality of vanes (137, 337) adapted to direct a flow of gas from the scroll passage (125, 325) against the one or more blades (131, 331) of the turbine wheel (129, 329) in the gas outlet, wherein the nozzle ring (135, 335) comprises at least one vane of the plurality of vanes (137, 337) being a sealing vane (139, 339) that seals the first portion (143, 343) of the scroll passage (125, 325) from the second portion (145, 345) of the scroll passage (125, 325), and means (149, 151, 349, 351) for moving the sealing vane (139, 339) relative to the scroll passage (125, 325) to establish a bypass flow from the first portion (143, 343) of the scroll passage (125, 325) into the second portion (145, 345) of the scroll passage (125, 325), wherein the means (149, 151, 349, 351) for moving the sealing vane (139, 339) comprise means for moving the nozzle ring (135, 335) relative to the scroll passage (125, 325), and wherein the sealing vane (139, 339) is adapted to be moved relative to the scroll passage (125, 325) by moving the nozzle ring (135, 335) relative to the scroll passage (125, 325), thereby opening a bypass or passage (147, 347) from the first portion (143, 343) into the second portion (145, 345) of the scroll passage (125, 325). a turbine (123, 323) comprising a scroll passage (125, 325) comprising at least a first portion (143, 343) near a beginning of the scroll passage (125, 325) and a second portion (145, 345) near an end of the scroll passage (125, 325), a gas outlet extending axially from the scroll passage (125, 325), a turbine wheel (129, 329) comprising one or more blades (131, 331) disposed in the gas outlet, and means for establishing a bypass flow from the first portion (143, 343) into the a scroll passage (125, 325) comprising at least a first portion (143, 343) near a beginning of the scroll passage (125, 325) and a second portion (145, 345) near an end of the scroll passage (125, 325), a gas outlet extending axially from the scroll passage (125, 325), a turbine wheel (129, 329) comprising one or more blades (131, 331) disposed in the gas outlet, and means for establishing a bypass flow from the first portion (143, 343) into the second portion (145, 345) of the scroll passage (125, 325), wherein the means for establishing the bypass flow comprises a nozzle ring (135, 335) arranged between the scroll passage (125, 325) and the gas outlet, the nozzle ring (135, 335) comprising a plurality of vanes (137, 337) adapted to direct a flow of gas from the scroll passage (125, 325) against the one or more blades (131, 331) of the turbine wheel (129, 329) in the gas outlet, wherein the nozzle ring (135, 335) comprises at least one vane of the plurality of vanes (137, 337) being a sealing vane (139, 339) that seals the first portion (143, 343) of the scroll passage (125, 325) from the second portion (145, 345) of the scroll passage (125, 325), and means (149, 151, 349, 351) for moving the sealing vane (139, 339) relative to the scroll passage (125, 325) to establish a bypass flow from the first portion (143, 343) of the scroll passage (125, 325) into the second portion (145, 345) of the scroll passage (125, 325), wherein the means (149, 151, 349, 351) for moving the sealing vane (139, 339) comprise means for moving the nozzle ring (135, 335) relative to the scroll passage (125, 325), and wherein the sealing vane (139, 339) is adapted to be moved relative to the scroll passage (125, 325) by moving the nozzle ring (135, 335) relative to the scroll passage (125, 325), thereby opening a bypass or passage (147, 347) from the first portion (143, 343) into the second portion (145, 345) of the scroll passage (125, 325).