Part#AS0171R-4brl - Complete AussieSpeed 6 inch finned air cleaner. This raw shot blasted finished 6 inch air cleaner has flat fins and comes complete with a filter and a zinc coated tin base to suit a  5 and 1/8 inch neck. This is your typical standard 4 barrel carb air cleaner neck size, which is common to Holley 2 barrel and 4 barrel carburettors, Edelbrock, Carter, Quadrajet, Demon, Barry Grant, Proform, etc.