An assembly for an exhaust bypass valve of a two-stage turbocharger can include a first turbocharger stage; a second turbocharger stage; an exhaust bypass valve that includes an open state and a closed state; an actuator; and a linkage mechanism that links the exhaust bypass valve to the actuator where the linkage mechanism includes a spring-biased linkage with a preset load where, in the closed state of the exhaust bypass valve, an axial length of the spring-biased linkage increases responsive to application of a load by the actuator that exceeds the preset load.