Holley Main Jets 66 #122-66 4340000 1/2 Inch Drive Hex Bit

1/2 Inch Drive Hex Bit AF Socket Chrome vanadium steel

Temperature for Snap-Loc Systems is approximately 200ø F (93øC)

Surge protection - Metal Oxide Varistors

1 handle for chuck (Allen key supplied)

Holley Main Jets 66 #122-66 4340000 1/2 Inch Drive Hex BitThese 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