Description
Proper jetting is critical to carburetor performance—too rich and you’ll lose power and fuel economy, too lean and you risk engine damage. The Holley Main Jets (2) 122-91 deliver precision fuel metering for optimal air-fuel ratio across your power band, ensuring consistent performance whether you’re tuning a street engine or dialing in a race application. As a direct OEM replacement, these brass jets are engineered to exact specifications for reliable operation in Holley carburetors.
- Size: #91 main jets
- Orifice diameter: 0.109″
- Material: Brass construction
- Quantity: Pair (2 jets)
- Fitment: Holley carburetors
- Installation: Bolt-on replacement
- MPN: 122-91






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