Carburetor Standard Main Jet - 122-79 rear-abs and Scirocco

and Scirocco

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

Hg to 40 PSI

These 1-3/4" shorty style performance headers fit the very popular 5

Carburetor Standard Main Jet - 122-79 rear-abs and SciroccoOverview: 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 &