Carburetor adapter designed to allow installation of square-flange 4-barrel carburetors onto spreadbore intake manifolds, or vice versa. This adapter makes it possible to run common square-bore carburetors such as Holley 4150/4160, Edelbrock, and Carter AFB on Quadrajet or Thermoquad spreadbore manifolds. By flipping the adapter over, it can also be used to install a spreadbore carburetor onto a square-bore intake.

The open-center design promotes improved air and fuel distribution, while the 3/4 inch thickness provides proper spacing without excessive height. Constructed from durable die-cast aluminum, this adapter installs easily between the intake manifold and carburetor and includes all necessary gaskets and hardware.

• Carburetor adapter
• Square bore to spreadbore (reversible design)
• Open center design for improved airflow
• Die-cast aluminum construction
• Thickness: 3/4 inch (without gaskets)
• Installs between carburetor and intake manifold
• Includes gaskets, studs, nuts, and washers