Seamlessly adapt between any spread bore manifold and square bore carburetor. Or the reverse. This adapter is referenced in the Holley Avenger 2-BBL TBI Fuel Injection Kit's instructions. While that kit includes both a 2-BBL TBI to square bore and 2-BBL TBI to spread bore adapter, at times using this 4-BBL square-to-spread bore adapter makes this work much more smoothly.
5 - This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.