Based on performer RPM-series with unique air gap. Air gap cooler and denser mixture for more power. Designed for 1500 to 6500 RPM. Improve performance on the street or race track.Larger cross-sectional area and taller card flange. Compatibility with large displacement 351W based engines. For 4 bbl carbs. Available in cast, polished and endurashine finish. Installation Instructions Installation Instructions Installation Instructions Warranty
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