Carburetor Standard Main Jet - 122-80 exhaust-manifolds charge air pressure is directed

charge air pressure is directed directly at the compressor wheel which helps keep the turbo spooled upon lifting the throttle

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Carburetor Standard Main Jet - 122-80 exhaust-manifolds charge air pressure is directedOverview: 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. Click on Catalog Product Page for complete listing of jets and sizes. Features: Fits All Holley Model 2010, 2300, 4010, 4011, 4150, 4160 &