An air filter mounting plate having sealing side and a filter media retaining side, said mounting plate including an air passage opening and a gasket encircling the air passage opening provided on sealing side of the mounting plate, the gasket comprising a connection portion and double sealing lips (7a,7b) extending from the connection portion, and wherein the gasket is joined with the mounting plate by the connection portion being fixed on the sealing side of the mounting plate.

A filter module includes a filter media, a frame enclosing the filter media so as to define a fluid flow pathway extending between upstream and downstream sides of the filter module, and a gasket arranged between the filter media and the frame to provide a seal tight engagement, wherein the gasket includes a monolithic sheet, and the monolithic sheet is folded in accordion style to form a plurality of pleats with zig-zag folds.

A filter has a filter housing with a filter housing cover coupled to a filter housing part to close a receiving space configured to receive a first filter element and a second filter element each provided with a filter medium body and a frame device around the filter medium body. The filter housing has a radially projecting, circumferential contact shoulder in the receiving space. The filter housing cover, when mounted, exerts an axial clamping force on the frame device of the first filter element. The clamping force is transmitted through the frame device of the first filter element to the frame device of the second filter element. The frame device of the second filter element has a circumferential seal with a hollow chamber profile pressed by the clamping force on the contact shoulder to seal-tightly contact the contact shoulder.