An exhaust-gas system for guiding and aftertreating exhaust gases from an exhaust-gas source, such as an internal combustion engine, with a flow section through which the exhaust gas may flow, with at least one component which is provided for the exhaust-gas aftertreatment, is arranged in the flow section and through which the exhaust gas may flow, and with an actuator for influencing the exhaust-gas flow in the flow section. The actuator is in fluid communication with the gas volume in the flow section, as a result of which the flow direction of the exhaust gas which flows through the flow section is influenced.