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. If you are looking for an even quicker, easier main jet change-out option, see our selection of Hex Head Pro-Jets.
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.
- All main jets are sold 2 per package