Holley main jets allow you to fine tune your carburetor. These jets have 1/4"-32 UNF thread and they are offered in a wide variety of hole sizes to allow fine tuning of your specific application.
All main jets are sold 2 per package
Note: Jet hole sizes provided below are for reference only. All Holley jets are sized by actual flow and may vary slightly from the sizes listed.
Note: Jet hole sizes provided below are for reference only. All Holley jets are sized by actual flow and may vary slightly from the sizes listed.
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Main Jets
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Standard Main Jet 40 Hole size .040"
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Standard Main Jet 41Hole size .041"
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Standard Main Jet 42Hole size .042"
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Standard Main Jet 43Hole size .043"
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Standard Main Jet 44Hole size .044"
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Standard Main Jet 45Hole size .045"
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Standard Main Jet 46Hole size .0465"
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Standard Main Jet 47Hole size .047"
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Standard Main Jet 48Hole size .048"
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Standard Main Jet 49Hole size .048"
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Standard Main Jet 50Hole size .049"
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Standard Main Jet 51Hole size .050"
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Standard Main Jet 52Hole size .052"
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Standard Main Jet 53Hole size .052"
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Standard Main Jet 54Hole size .053"
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Standard Main Jet 55Hole size .054"
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Standard Main Jet 56Hole size .055"
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Standard Main Jet 57Hole size .056"
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Standard Main Jet 58Hole size .057"
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Standard Main Jet 59Hole size .058"
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Standard Main Jet 60Hole size .060"
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Standard Main Jet 61Hole size .060"
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Standard Main Jet 62Hole size .061"
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Standard Main Jet 63Hole size .062"
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Standard Main Jet 64Hole size .064"
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Standard Main Jet 65Hole size .065"
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Standard Main Jet 66Hole size .066"
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Standard Main Jet 67Hole size .0663"
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Standard Main Jet 68Hole size .0685"
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Standard Main Jet 69Hole size .0693"
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