This open carburetor spacer fits square bore carburetors such as Holley and Edelbrock four barrel carburetors, 4" height with open design adds plenum volume to increase high RPM horsepower, Can be used to raise your carburetor to achieve a through the hood look, Also used to raise your carburetors and hood scoop on open engine cars to get the proper hood scoop height, Hardware is not included - we suggest two carburetor stud kits part number 13560 for use with this adapter.
