Pro-Flo 4 Dual-Quad HEMI EFI System #35670 is intended for use with 1964-71 Mopar Gen II 426-572 HEMI engines operating in the 2,500-6,500+ RPM range. This EFI incorporates a single-plane Air-Gap design manifold with dual square-bore 4150-style throttle bodies that bolts directly onto vehicles with a shaker hood. The Dual-Quad HEMI EFI manifold is compatible with factory-style cylinder heads but optimized for use with Victor Jr. HEMI heads. Manifold comes preassembled and ready to run with throttle bodies, 60 lb/hr injectors and fuel rails. Also included is a single-connection distributor designed to work specifically with Pro-Flo 4 providing fully sequential-port injection and infinite control over ignition and fuel events under all conditions. This system is rated for 825 horsepower at 43 PSI with all supporting sensors, ECU, and wire harnesses. Key advancements of Pro-Flo 4 EFI are its Self-Calibrating Fuel Map Technology, Wide-Band O2 Closed Loop Mixture Control, and new low-profile ECU with faster processor and upgraded Bluetooth chip for reliable connectivity with the E-Tuner app. The exclusive Edelbrock E-Tuner 4 app is Free and Available for Android and IOS based smart phone or tablet.