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These are the main jets located at the   bottom of either the primary or secondary metering block of a Holley four-barrel   carburetor. These replaceable jets are the restrictors that determine the air/fuel ratio at part- and wide-open throttle.
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These are the main jets located at the bottom of either the primary or secondary metering block of a Holley four-barrel carburetor. These replaceable jets are the restrictors that determine the air/fuel ratio at part- and wide-open throttle.  View Related Article

 

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