Description: This carburetor adapater kit fits 4-bolt, 4-barrel carburetors to 4-bolt, 2-barrel intake manifolds or 4-bolt, 2-barrel carburetors to 4-bolt, 4-barrel intake manifolds and is 1" thick with an open center, square bore to 2 barrel. Feature: Material:Aluminum Carburetor Barrels:2-Barrel Carburetor Flange Type:2-Barrel 4-Bolt Hardware Included:Yes Overall Thickness:1" Quick and Easy Installation Diecast Aluminum Adapters Includes Gaskets and Studs Including Nuts and Washers Reference Part Number:1933 Application: Carburetor Flange (application): 2-barrel .