122-104 Standard Main Jet 104 Hole size .1340"

Name: 122-104 Standard Main Jet 104 Hole size .1340"
Brand: HOLLEY
SKU: 510-122-104
Price: 16.39 USD
Availability: InStock

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Main Jets

Hole size .1340"
Carburetor Jet

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

Fine-tune your fuel delivery and unlock peak performance with Holley Main Jets—precision-engineered for accuracy, consistency, and optimal power output. Whether you're dialing in your street machine or tweaking your track setup, Holley jets are designed to give you complete control over your air-fuel mixture. Each jet is CNC-machined and flow-tested to ensure consistent performance across the entire RPM range. Available in a wide variety of sizes, Holley Main Jets allow you to easily adjust for altitude, temperature changes, or modifications to your engine. Perfect for racers and tuners alike, these jets are compatible with most Holley carburetors and are a must-have for anyone seeking reliable tuning precision. When it comes to getting the most from your carbureted engine, using the right holley carburetor jets can make all the difference. Whether you're correcting a rich or lean condition, Holley’s unmatched quality ensures smooth acceleration, responsive throttle, and better fuel efficiency. Engineered with the same performance legacy that has made Holley a trusted name for decades, these Holley carb jets deliver professional-grade results without the guesswork. Designed for quick swaps and easy installation, they’re ideal for both weekend wrenchers and seasoned pros. Don’t let inconsistent fueling hold your build back. Upgrade to Holley Main Jets from JEGS and experience smoother performance, greater tuning flexibility, and the confidence that comes with using a trusted brand. Order today and keep your carbureted setup running at its best.