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consider P/N 18666
which are threaded prior to heat-treating
826-08-08S
Aluminium ORB male plug with Hex head
Black Finish
Standard Main Jet #78 HO122-78 302-351C consider P/N 18666Standard Main Jet #781 4 32" Thread, . 0870" Hole Size (Pair) HO122 78 122 78 These metering orifices control fuel flow into the metering system. They are rated in flow capacity "cubic centimetres 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.
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