Carburetor Standard Main Jet - 122-70 automatic The system finishes with a

The system finishes with a pair of 3

Engine:  V8

6L V8 1967 Chevrolet C10 Suburban 283/4

Applications: 1999-2006 Chevrolet Silverado 1500

2007-2008 Chevrolet Tahoe 325 CID

Carburetor Standard Main Jet - 122-70 automatic The system finishes with aOverview: 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 &