The 1411 is a 750 CFM carburetor, so its calibration kit carries larger jets than the 600 CFM equivalent. Four jet sizes, four metering rod combinations and five step-up springs give enough range to dial in part-throttle mixture and set where power enrichment begins, which is how you fix a lean cruise or a rich stumble without guessing.

Edelbrock 1489 Calibration Kit Contents:

• Metering jets in .104, .107, .110 and .113.
• Metering rods in .070 x .042, .073 x .037, .073 x .042 and .075 x .037.
• Step-up springs rated 3 in. Hg blue, 4 in. Hg yellow, 5 in. Hg orange, 7 in. Hg pink and 8 in. Hg silver.
• Specifically for part number 1411 carburetors.
• Sold as a kit. Change one variable at a time and road test between steps.

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

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