Embodiments of the invention are directed to an exhaust system for a combustion engine with a bent pipe section conducting an exhaust gas flow. The exhaust system further includes an injector for introducing a liquid reduction agent into the exhaust gas flow, which is connected to the pipe section via a connecting pipe so that the injector can introduce the reduction agent through the connecting pipe into an introduction region of the pipe section into the exhaust gas flow. The risk of a crystallization of the reduction agent can be reduced with a return flow plate, which in the pipe section is arranged upstream of the introduction region.