Product Features:Based on Performer Series with Unique Air GapAir Gap Cooler and Denser Mixture for More PowerFor Idle to 5500 RPM Street-Driven PerformanceDual-Plane Low-Rise Intake w/180 deg .Firing OrderPatented Runner Design Ensures Broad Torque CurveExcellent Throttle Response and Mid-Range PowerFits Both Spread and Square Bore CarburetorsAlso in Polished/PermaStar/EnduraShine Finish