Holley Main Jets

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.

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Main Jets

Holley Standard Main Jet 40 Hole size .040"

Holley 122-40

Part Number: 510-122-40

Holley 122-40

Holley Standard Main Jet 40 Hole size .040"

$9.07

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Standard Main Jet 40

Hole size .040"

Holley Main Jets

Main Jets

Holley Standard Main Jet 40 Hole size .040"

Holley Standard Main Jet 40 Hole size .040"

Holley Standard Main Jet 41 Hole size .041"

Holley Standard Main Jet 41 Hole size .041"

Holley Standard Main Jet 42 Hole size .042"

Holley Standard Main Jet 42 Hole size .042"

Holley Standard Main Jet 43 Hole size .043"

Holley Standard Main Jet 43 Hole size .043"

Holley Standard Main Jet 44 Hole size .044"

Holley Standard Main Jet 44 Hole size .044"

Holley Standard Main Jet 45 Hole size .045"

Holley Standard Main Jet 45 Hole size .045"

Holley Standard Main Jet 46 Hole size .0465"

Holley Standard Main Jet 46 Hole size .0465"

Holley Standard Main Jet 47 Hole size .047"

Holley Standard Main Jet 47 Hole size .047"

Holley Standard Main Jet 48 Hole size .048"

Holley Standard Main Jet 48 Hole size .048"

Holley Standard Main Jet 49 Hole size .048"

Holley Standard Main Jet 49 Hole size .048"

Holley Standard Main Jet 50 Hole size .049"

Holley Standard Main Jet 50 Hole size .049"

Holley Standard Main Jet 51 Hole size .050"

Holley Standard Main Jet 51 Hole size .050"

Holley Standard Main Jet 52 Hole size .052"

Holley Standard Main Jet 52 Hole size .052"

Holley Standard Main Jet 53 Hole size .052"

Holley Standard Main Jet 53 Hole size .052"

Holley Standard Main Jet 54 Hole size .053"

Holley Standard Main Jet 54 Hole size .053"

Holley Standard Main Jet 55 Hole size .054"

Holley Standard Main Jet 55 Hole size .054"

Holley Standard Main Jet 56 Hole size .055"

Holley Standard Main Jet 56 Hole size .055"

Holley Standard Main Jet 57 Hole size .056"

Holley Standard Main Jet 57 Hole size .056"

Holley Standard Main Jet 58 Hole size .057"

Holley Standard Main Jet 58 Hole size .057"

Holley Standard Main Jet 59 Hole size .058"

Holley Standard Main Jet 59 Hole size .058"

Holley Standard Main Jet 60 Hole size .060"

Holley Standard Main Jet 60 Hole size .060"

Holley Standard Main Jet 61 Hole size .060"

Holley Standard Main Jet 61 Hole size .060"

Holley Standard Main Jet 62 Hole size .061"

Holley Standard Main Jet 62 Hole size .061"

Holley Standard Main Jet 63 Hole size .062"

Holley Standard Main Jet 63 Hole size .062"

Holley Standard Main Jet 64 Hole size .064"

Holley Standard Main Jet 64 Hole size .064"

Holley Standard Main Jet 65 Hole size .065"

Holley Standard Main Jet 65 Hole size .065"

Holley Standard Main Jet 66 Hole size .066"

Holley Standard Main Jet 66 Hole size .066"

Holley Standard Main Jet 67 Hole size .0663"

Holley Standard Main Jet 67 Hole size .0663"

Holley Standard Main Jet 68 Hole size .0685"

Holley Standard Main Jet 68 Hole size .0685"

Holley Standard Main Jet 69 Hole size .0693"

Holley Standard Main Jet 69 Hole size .0693"