Holley 4150 4 Barrel Carburetor with (2) Air Cleaner Spacer Rings

Holley 4150 cast metal 4 barrel carburetor with dual fuel bowls, fuel level sight plugs, a contoured chokeless air horn, dual vertical vent tubes, down leg boosters, brass air bleeds, mechanical throttle linkage with return springs, a secondary actuation cam, and (2) machined aluminum air cleaner spacer rings with (1) mounted atop the air horn.