Turbocharger

An integrated turbocharger/manifold (100) for an internal combustion engine comprises an inner ductwork (111-115, 120, 121, 125) and a turbine housing (130, 131). An outer shell (200, 210) covers a majority of the ductwork (111-115, 120, 121, 125) and the turbine housing (130, 131). A method for manufacturing the integrated turbocharger/manifold comprising an inner ductwork (111-115, 120, 121, 125), a turbine housing (130, 131), a manifold inlet flange (110), a bearing housing flange (150), a turbine outlet flange (144), and two outer shell portions (200, 210) includes a first production stage wherein the manifold inlet flange (110), the bearing housing flange (150), and the turbine outlet flange (144) are held in mutually fixed positions as one of the outer shell portions (200, 210) is welded to said components.