This pair of standard main carburetor jets features a 1/4‑32 UNF thread and a 0.067‑inch hole size.
These metering orifices control fuel flow into the metering system. They are rated in flow capacity, cubic centimeters per minute, and are changeable for tuning purposes. The shape of the entry, exit, and size determine flow. All Holley Main Jets are flow tested and then stamped with the correct number.
Main Carburetor Jet Replacement Features:
These metering orifices control fuel flow into the metering system. They are rated in flow capacity, cubic centimeters per minute, and are changeable for tuning purposes. The shape of the entry and size determine flow. All Holley Main jets are flow tested and then stamped with the correct number.
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