Description
Proper jetting is fundamental to carb tuning—get it wrong, and you’re leaving power on the table or running lean. These Holley main jets deliver the precise fuel metering your engine needs for optimal performance across the RPM band. Whether you’re dialing in a street machine or fine-tuning a race carb, a quality jet swap is one of the most cost-effective tuning adjustments you can make.
- Holley main jets
- Size 99 (0.126″ ID)
- Brass construction
- Pair included
- Direct fit: Holley carburetors
- Bolt-on installation






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