Holley Standard Main Jet #54 HO122-54 ARP Fasteners Part Number: AF150-06S

Part Number: AF150-06S

Part Number: AF917-04S

Part Number: AF463-0032P

and can be installed as an auxiliary or booster pump

Part Number: FE1603

Holley Standard Main Jet #54 HO122-54 ARP Fasteners Part Number: AF150-06SStandard Main Jet #541 4 32" Thread, . 053" Hole Size (Pair) Brand: HOLLEY Part Number: HO122 54 Description: 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.