Abstract: An air circulation system for a motor vehicle front end, having at least one air duct having an air inlet and an air control device. The air control device comprises at least one, in particular lamellar, air control flap which is mounted in pivot bearings and can be pivoted via a drive, in particular an actuator, in order to regulate the passage of air through the air inlet. The air duct comprises a foamed or injection-molded material at least in the region of the air control device, in particular in the region of the air inlet. At least one or a plurality of the pivot bearings is/are accommodated or formed in the foamed material.