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AF129-05BLK
Vintage Series Fined Valve CoversBlack Center Bolt Suit SB Chev
Billet Top Water Housing - SilverSuits Nissan/Holden
and a powdered metal impeller
AF2251-1120
Standard Main Jet #49 HO122-49 Product:1/4-32" Thread, .048" Hole Size (Pair) AF129-05BLKStandard Main Jet #491 4 32" Thread, . 048" Hole Size (Pair) HO122 49 122 49 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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