Holley has always offered vacuum-secondary performance carburetors in two versions--4150 models with replaceable jets in the secondaries, and 4160 models with a metering plate and no replaceable jets.
In production since the '50s, Holley 4150/4160 carbs come in all shapes and sizes. Counterclockwise from bottom left: 3310-2 750 cfm 4160 is considered to be a "universal" carb, thanks to its ...
Barry Grant's Phase 1 kit is the most basic. It offers metering-block and bowl gaskets, two accelerator pump cams and squirters, a small assortment of jets and three lighter vacuum diaphragm springs.
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