stock main jets
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for what year and market? Mazda had slightly different jetting over the years, and between CA and federal.
and i'm not sure what you mean by luck either, power is basically dictated by airflow, and the jetting will have a really small effect. if you were trying to pass smog, or squeeze and extra MPG out of it, that would be doable.
and i'm not sure what you mean by luck either, power is basically dictated by airflow, and the jetting will have a really small effect. if you were trying to pass smog, or squeeze and extra MPG out of it, that would be doable.