Abstract: A muffling device for use on the exhaust of an electric generator engine includes an arrestig chamber, partitioned into two compartments by means of an apertured partition. The first compartment is packed with stainless steel wool to filter out hot particulates from the exhaust of the generator engine. The filtered exhaust gases pass through the apertures into the second compartment from where they are directed to the atmosphere by means of a tubular member connected in said second compartment. A muffling chamber is connected directly to the exhaust of the electric generator engine and the exhaust gases first flow into that chamber. A cross-over conduit is in fluid communication with both chambers and directs the exhaust gases from the muffling chamber into the first compartment of the arresting chamber.