Carburetor Standard Main Jet - 122-90 transmission-lines This is even true when

This is even true when installing larger and expensive factory units like those found on high output vehicles

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1 V8 2003 - 2015 Chevrolet Silverado 2500 HD LT 364/6 V8 2003 - 2005 Chevrolet Silverado 2500 HD LT 496/8

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Carburetor Standard Main Jet - 122-90 transmission-lines This is even true whenOverview: 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 &