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.
Installation Notes: NOT FOR USE WITH CARURETORS ORIGINALY DESIGNED FOR ALCOHOLFeatures:Standard Main Jet. 126" Jet size1/4-32 ThreadSizes from 40-110Fits All Holley Model 2010, 2300, 4010, 4011, 4150, 4160 & 4500Ian Boettcher Race Parts offers Holley Carburetor Standard Main Jet #110, .156" 122-110 at low everyday prices. Be sure to check out all of our products from Holley Performance Products including Holley Performance Products Gasoline Jets.