Carburetor Standard Main Jet - 122-71 intermediate EO # D-164-4 Collector Diameter

EO # D-164-4 Collector Diameter 2

The tailpipe then exits in the stock location through the factory exhaust bezels

6L V8 1955 - 1957 Chevrolet Truck   265/4

3L V8 1976 - 1978 Dodge B200 400/6

and is finished off with quad 4

Carburetor Standard Main Jet - 122-71 intermediate EO # D-164-4 Collector DiameterOverview: 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 &