Allstar ALL26091 14" Diameter 5-1/8" Offset Flange Plain Aluminum Carburetor Air Cleaner Bottom Air cleaner bottom has a 14 inch diameter with a 5-1/8 inch offset carburetor flange for a 4bbl carb Offset design allows use of hei style distributors Constructed from quality aluminum This is a bottom only. Top and filter element sold separately Sold each