Abstract: The present invention provides a two-way vent for a vehicle that opens in a front and rear direction and includes a preferably symmetric cam having an apex on its centerline, and first and second convex sides each terminating respectively in a recess at the base of the cam. The degree of opening of the vent is determined by the displacement of a follower rod with respect to the apex of the cam. From its originally closed position with the follower positioned at the apex, the vent can be opened either forward or backward by selectively moving a handle that actuates the follower along the curved paths defined by the convex sides. The cam preferably includes a lateral cusp at the end of each curved path, the cusp defining a transition from the curved path to the recess.