The function of an air filter is to protect the engine from attack by external contaminants. Depending on its cubic capacity, an engine takes in 200 to 500 cubic meters of air every hour. This contains dust that eventually forms an abrasive paste that threatens the engine’s operation. As a result, an air filter must be highly effective.

Sogefi air filters are available for passenger cars under the brand names Purflux, CoopersFiaam, Fram®, and under Sogefi Pro for commercial vehicles.