Based on performer RPM-series with unique air gap. Air gap cooler and denser mixture for more power. Non-EGR. Designed for 1500 to 6500 RPM. Dual-plane high-rise intake. Improve performance on the street or race track. For 1992 and later 5.2L and 1993 and later 5.9L Mopar Magnum V8. 4 bbl carbs. Available in cast or polished finish.