The Moroso 4412 2BBL to 4150/4160 carburetor adapter is a 1-inch billet aluminum adapter that converts two-barrel bolt patterns to the 4150/4160 four-hole flange. It provides a billet aluminum conversion option where a one-inch adapter is required to mount 2BBL carburetors to 4150/4160-style intake flanges.
Moroso 4412 2BBL to 4150/4160 Carburetor Adapter - 1in - Billet Aluminum