an exhaust system for internal combustion engines , in particular two - cycle internal combustion engines , includes a resonance - type exhaust part having at least one diffuser - cone unit formed with a diffuser , a countercone , and a connecting part with a preferably constant cross section extending between the diffuser outlet cross section and cone inlet cross section . in order to provide the resonance - type exhaust part as compact as possible by employing a simple production method , the connecting part is formed as a first deflection arc , preferably with an angle of deflection of about 180 °± 30 °.