Holley Main Jets 65 #122-65 1220370 Threaded neck type 3/8 –

Threaded neck type 3/8 – 27 UNS-2A 6mm long with hexagonal nut

With hold feature & low battery indicator

✓ Moderate Sound

Tree shape radius end 9

Standard Set C-10A - Combination Keyway Broach Set

Holley Main Jets 65 #122-65 1220370 Threaded neck type 3/8 –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. Standard Main Jet . 065" Jet size 1 4 32 Thread Sizes from 40 110 Fits All Holley Model 2010, 2300, 4010, 4011, 4150, 4160 & 4500