An exhaust system component for a motor vehicle has a first exhaust passage, an attachment flange, which encloses the first exhaust passage, for the connection of the component to an adjacent component, the attachment flange defining an attachment plane for the contact with the adjacent component and having fastening holes for the connection to the adjacent component, and a second exhaust passage, which is spaced apart from the first exhaust passage in a longitudinal direction of the component. A normal line on the attachment plane extends at a non-negligible angle to the longitudinal direction, and the fastening holes are elongated in a direction parallel to the attachment plane.