A crosstalk device for coupling of two exhaust lines of an exhaust system of an internal combustion engine through which exhaust can flow in parallel has a housing having two inlets and two outlets that are connected so they communicate through an interior space of the housing and by which the two exhaust lines can be connected to the crosstalk device. The crosstalk device has an inexpensive design and high stability because its housing is assembled from two half-shells whose parting plane extends across the main direction of flow of the crosstalk device.