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.
|Gaskets and Mounting Hardware
|Adapts Holley Square Bore (4150 or 4160) Throttle Bodies to Spread-Bore Manifolds
|Unit of Sale