Joined: Mon Dec 07 2009, 08:36PM
Location: az
Posts: 192
1950s Imperial Oil Bath Air Cleaners...may fit other models
Black one is 15.75 inches at the top and has a small outlet for a hose Grey is 16 inches at the top and has an extra cutout on the bottom to clear something under the air cleaner
OD of the mounting hole underneath is 4.5 inches for both