Holley Main Jets 56 #122-56 Product Type_Taper Adaptors Only accepts the adjustable-style needle

Only accepts the adjustable-style needle and seat assembly

Code 1800001

Note: Not designed for high rpm applications

Distributor Gasket Included: Yes

Body Width: 9

Holley Main Jets 56 #122-56 Product Type_Taper Adaptors Only accepts the adjustable-style needleThese 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 . 056" Jet size 1 4 32 Thread Sizes from 40 110 Fits All Holley Model 2010, 2300, 4010, 4011, 4150, 4160 & 4500