Product details:

Patented runner tuning and a 180 degree firing order Intended for high-performance street or competition engines that run up to 6,500 RPM Front height of the manifold measures 4.20 and the rear 5.25 Designed for maximum power and a broad torque curve for high-performance street/marine Provides power like a single-plane and throttle response like a dual-plane The Edelbrock Performer RPM Intake Manifold is designed for maximum power and a broad torque curve for high- performance street/marine. They are intended for high-performance street or competition engines that run up to 6,500 RPM. The front height of the manifold measures 4.20 and the rear 5.25. The Performer RPMs are dual-plane, high-rise intakes with a 180 degree firing order. They produce incredible top-end horsepower while retaining good throttle response. The Performer RPMs have larger plenums and runners to match the free-flowing exhaust, high-lift cams and other modifications of a high output engine. They are not for emissions-equipped engines. The Performer RPM intake gives you the ultimate in street high-performance. It provides power like a single-plane and throttle response like a dual-plane.