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150 Series Taper One-Piece Full Flow Swivel 180° Hose End -12ANBlue/Red Finish
Super Damper 6
Made from billet 6061 T6 aluminium these regulators are an ideal upgrade for the Carburettor or EFI fuel systems
550 Series Cutter Style One Piece Swivel 30° Stepped Hose End -8AN to -6 HoseSilver Finish
Designed for street 289-302W Ford
Standard Main Jet #72 HO122-72 Product:1/4-32" Thread, .0755" Hole Size (Pair) 150 Series Taper One-Piece FullStandard Main Jet #721 4 32" Thread, . 0755" Hole Size (Pair) HO122 72 122 72 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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