Hexagon Air Cleaner.
Aluminum Air Cleaner for Flathead Ford Two Carb Manifold.
Fits Centre Spacing 4-3/4” to 4-7/8” Carb Opening,
Which will be the same as a Thickstun, Offenhauser, Edelbrock and more intakes..
They were used on the Miller Indy Fords, Take a look in the very first hot rod mags you will find in there!!