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AR643-3250
64-2900BLK
Composite Intake Manifold Gasket Set 1312-2 FE1312-2 Suit Chev LS1-LS6 1
AF9251-075-13
In cludes Washers
Standard Main Jet #109 HO122-109 Weather Stations AR643-3250Standard Main Jet #1091 4 32" Thread, . 150" Hole Size (Pair) HO122 109 122 109 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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