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Flow-tested metering orifice ensures accurate fuel delivery for optimal engine performance
Changeable jet size allows for precise tuning and customization
Compatible with a wide range of Holley carburetor models from 2010 to 2023
Available in multiple sizes and thread diameters for versatile fitment
OEM and aftermarket options provide flexibility for different repair needs
Summarized by Shop
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 determines flow. All Holley Main Jets are flow tested and then stamped with the correct number