An engine cylinder head and turbocharger assembly comprising: an engine cylinder head for an internal combustion engine having a plurality of cylinders spaced apart along an engine axis, the engine cylinder head comprising a casting and having an intake side on one side of the engine axis and an exhaust side on an opposite side of the engine axis; and a turbocharger comprising a compressor wheel mounted within a compressor housing and a turbine wheel mounted within a turbine housing and connected to the compressor wheel by a shaft that extends along a turbocharger axis about which the shaft rotates, the turbocharger further comprising a center housing connected between the compressor housing and the turbine housing, the center housing containing bearings for the shaft, the turbine housing defining a volute that surrounds the turbine wheel and receives exhaust gas from the engine and a nozzle that directs exhaust gas from the volute into the turbine wheel, the turbine housing further defining an axial bore through which exhaust gas that has passed through the turbine wheel is discharged from the turbine housing; characterised in that at least part of the turbine housing is an integral portion of the casting of the engine cylinder head, and wherein the turbocharger is mounted to the engine cylinder head with the turbocharger axis oriented transverse to the engine axis and with the compressor housing oriented toward the intake side and the turbine housing oriented toward the exhaust side of the engine cylinder head, wherein the turbine housing comprises a first turbine housing portion and a second turbine housing portion formed separately from the first turbine housing portion, wherein the first turbine housing portion defines the volute and one wall of the nozzle and the second turbine housing portion defines an opposite wall of the nozzle, and wherein the second turbine housing portion is an integral portion of the casting of the engine cylinder head. an engine cylinder head for an internal combustion engine having a plurality of cylinders spaced apart along an engine axis, the engine cylinder head comprising a casting and having an intake side on one side of the engine axis and an exhaust side on an opposite side of the engine axis; and a turbocharger comprising a compressor wheel mounted within a compressor housing and a turbine wheel mounted within a turbine housing and connected to the compressor wheel by a shaft that extends along a turbocharger axis about which the shaft rotates, the turbocharger further comprising a center housing connected between the compressor housing and the turbine housing, the center housing containing bearings for the shaft, the turbine housing defining a volute that surrounds the turbine wheel and receives exhaust gas from the engine and a nozzle that directs exhaust gas from the volute into the turbine wheel, the turbine housing further defining an axial bore through which exhaust gas that has passed through the turbine wheel is discharged from the turbine housing; characterised in that at least part of the turbine housing is an integral portion of the casting of the engine cylinder head, and wherein the turbocharger is mounted to the engine cylinder head with the turbocharger axis oriented transverse to the engine axis and with the compressor housing oriented toward the intake side and the turbine housing oriented toward the exhaust side of the engine cylinder head, wherein the turbine housing comprises a first turbine housing portion and a second turbine housing portion formed separately from the first turbine housing portion, wherein the first turbine housing portion defines the volute and one wall of the nozzle and the second turbine housing portion defines an opposite wall of the nozzle, and wherein the second turbine housing portion is an integral portion of the casting of the engine cylinder head.