Extruded flap for a device for shutting off an air inlet of a motor vehicle front end

A flap including a flap with a front wall and a rear wall, the rear wall including a groove extending concentrically to the axis of rotation of the flap, the front wall and the rear wall being connected edge to edge and delimiting an inner cavity, the flap further including an end piece at each of the ends of the flap body, the end pieces including an inner part inserted into the cavity of the flap body and an outer part protruding from the flap body, at least one end piece including a hooking finger projecting from the end piece along the axis of rotation and being inserted within the groove, the hooking finger including at least one tooth intended to be implanted within the groove, the tooth being oriented so as to oppose the extraction of the end piece from the flap body.