Just got a 14" K & N Open Air cleaner, top and bottom. With it came a small cork and rubber gasket, a small plastic piece that has 3 different diameters as it gets further away from where it mounts, and screw and nuts for installation. Would this be for PCV valve return to the air cleaner?? Gasket is a small version of a thermostat gasket. Dont see anything I need this for just thought I would check with those in the know. Thanks.