Vintage Speed’s own 2″x4″-finned top classic air cleaner. The AC-10’s unique base design allows you to use the socket head set screw or attach with 1/4″-20 stud on carbs with drilled boss (roch 2gs etc.) Polished cast aluminum smooth surfaces. Tops of fins highlighted, with a modern frame element behind a plated screen and a three bar spinner nut. The classic look you want with the engine protection you need. Choose regular 2 5/8″ base or 2 5/16″ base for inline 6 application.