Holley Main Jets 66 #122-66 6053180 Automatically adjusts the jaws to

Automatically adjusts the jaws to the component

With 3day power reserve (exchangeable NiMH rechargeable battery)

Thread File No

40mm Posistop Chuck Stop

5 year warranty

Holley Main Jets 66 #122-66 6053180 Automatically adjusts the jaws toThese 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