Carburetor Standard Main Jet - 122-79 rear-abs 50-inch mandrel bent 409S stainless

50-inch mandrel bent 409S stainless steel downpipes fit only the factory Angled GM Ram Horn style manifolds and include 3 bolt flanges

OEM - 58721-26100--DS / 5872126100DS

and Scirocco

1963-1966 Chevrolet K10 Pickup

Rear Axle Type: 8 inch

Carburetor Standard Main Jet - 122-79 rear-abs 50-inch mandrel bent 409S stainlessOverview: 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 &