Carburetor Standard Main Jet - 122-90 transmission-lines Some models have an external

Some models have an external cooler line which we will also include

1963-1969 4

4L V8 1976 - 1980 Chevrolet K10   454/7

Don't let the low price fool you

this exhaust system is manufactured as a true dual exhaust using 2

Carburetor Standard Main Jet - 122-90 transmission-lines Some models have an externalOverview: 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 &