K&N crankcase vent filters are perfect for racing applications, vintage cars, or individuals who want to add some aesthetics to their classic carbureted engine. This vent filter has a K&N embossed chrome top and chrome base. The 5/16in flange is designed to clamp on to metal or plastic tubing where venting is needed. This air filter is constructed with a non-woven synthetic filter media so it can be cleaned and reused repeatedly.