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AF465-40BL
HO0-80575S
22mm and 24mm
Designed and calibrated for optimum street performance in small-block and big-block engines with Performer RPM
AF999-12SSH
Standard Main Jet #58 HO122-58 Product:1/4-32" Thread, .057" Hole Size (Pair) AF465-40BLStandard Main Jet #581 4 32" Thread, . 057" Hole Size (Pair) HO122 58 122 58 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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