Holley Main Jets 66 #122-66 6053180 dirt and scale

dirt and scale

PCA18 virgin grade plastic (no regrind)

Product Line: Proform Ford Racing Licensed Stamped Steel Valve Covers

5 year warranty

Nut Finish: Black oxide

Holley Main Jets 66 #122-66 6053180 dirt and scaleThese 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. Standard Main Jet . 066" Jet size 1 4 32 Thread Sizes from 40 110 Fits All Holley Model 2010, 2300, 4010, 4011, 4150, 4160 & 4500