An assembly for an exhaust bypass valve (520, 1320) of a two-stage turbocharger, the assembly comprising: a first turbocharger stage and a second turbocharger stage wherein one of the stages comprises a boss (540, 1340) that comprises a bore wherein the bore comprises an outer bore, an opening to the outer bore, an inner bore, a transition region between the outer bore and the inner bore, an inner opening to the inner bore wherein the transition region transitions from a smaller diameter of the inner bore to a larger diameter of the outer bore; an exhaust bypass valve (520, 1320) that comprises an arm pivotable to orient the exhaust bypass valve in an open state and a closed state; a valve shaft (550, 1350) disposed at least in part in the bore and operatively coupled to the exhaust bypass valve (520, 1320) wherein the valve shaft (550, 1350) comprises an inner end, an outer end and an axial stop disposed between the inner end and the outer end wherein the axial stop is disposed in the inner bore; an outer bushing (570, 1370) disposed at least in part in the outer bore and located axially along the valve shaft (550, 1350); and characterised in that the assembly comprises an inner bushing (580, 1380) axially fixed at least in part in the inner bore, partially within a chamber that is an exhaust chamber where the exhaust bypass valve (520, 1320) operates, and located axially along the valve shaft (550, 1350) between a portion of the arm of the exhaust bypass valve (520, 1320) and the axial stop of the valve shaft (550, 1350), wherein one end of the inner bushing (580, 1380) and the axial stop and an opposing end of the inner bushing (580, 1380) and a portion of the arm of the exhaust bypass valve (520, 1320) define an overall axial clearance that limits axial movement of the valve shaft (550, 1350) in the bore of the boss (540, 1340). a first turbocharger stage and a second turbocharger stage wherein one of the stages comprises a boss (540, 1340) that comprises a bore wherein the bore comprises an outer bore, an opening to the outer bore, an inner bore, a transition region between the outer bore and the inner bore, an inner opening to the inner bore wherein the transition region transitions from a smaller diameter of the inner bore to a larger diameter of the outer bore; an exhaust bypass valve (520, 1320) that comprises an arm pivotable to orient the exhaust bypass valve in an open state and a closed state; a valve shaft (550, 1350) disposed at least in part in the bore and operatively coupled to the exhaust bypass valve (520, 1320) wherein the valve shaft (550, 1350) comprises an inner end, an outer end and an axial stop disposed between the inner end and the outer end wherein the axial stop is disposed in the inner bore; an outer bushing (570, 1370) disposed at least in part in the outer bore and located axially along the valve shaft (550, 1350); and characterised in that the assembly comprises an inner bushing (580, 1380) axially fixed at least in part in the inner bore, partially within a chamber that is an exhaust chamber where the exhaust bypass valve (520, 1320) operates, and located axially along the valve shaft (550, 1350) between a portion of the arm of the exhaust bypass valve (520, 1320) and the axial stop of the valve shaft (550, 1350), wherein one end of the inner bushing (580, 1380) and the axial stop and an opposing end of the inner bushing (580, 1380) and a portion of the arm of the exhaust bypass valve (520, 1320) define an overall axial clearance that limits axial movement of the valve shaft (550, 1350) in the bore of the boss (540, 1340).