Exhaust gas purification device with a housing (5) with an especially divergent inlet end face (6) and an especially convergent exit end face (6) arranged in the housing (5) with exhaust gas feed ducts (1a) which one of the inlet end face (6) of the housing ( 5) facing open end face (3) and an opposite closed end face (4) facing the outlet end face (7) of the housing, and exhaust gas discharge ducts (1b) which have an open end face (3) facing the outlet end face (7) of the housing (5) ) and an opposite, closed end face (4) facing the inlet end face (6) of the housing (5), characterized in that exhaust gas supply and / or discharge ducts (1a, 1b) are axially multi-part.
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