Carburetor Standard Main Jet - 122-61 fuel-injectors-and-parts if you have the Second

if you have the Second Design please see FKT8902OM

1987-1988 Chevrolet R30

1 V8 2003 - 2005 Chevrolet Silverado 2500 HD Base 403/6

does not require any modifications to install them correctly

Front Brake Line Kit For 69-70 Mopar B-Body Power Disc Left Port M/C 2 Brake Valves Right-Front Under Frame Steel

Carburetor Standard Main Jet - 122-61 fuel-injectors-and-parts if you have the SecondOverview: 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 &