Edelbrock 35850 Pro-Flo 4 EFI Fuel Injection System Big Block Chevy Rectangle Port

The Edelbrock 35850 Pro-Flo 4 EFI System is engineered specifically for Big-Block Chevy engines with rectangle port cylinder heads, delivering a complete electronic fuel injection solution that combines modern technology with traditional styling. This fully sequential port fuel injection system features a high-performance intake manifold with a 1,000 CFM throttle body, fuel rails, and individual injectors for each cylinder.

Complete System Includes:

• Traditional 4150-style satin finish single plane intake manifold with 35 lb/hr injectors capable of supporting up to 550 horsepower at 58 PSI fuel pressure
• Plug-and-play single connection distributor designed specifically for Pro-Flo 4, plus a fully terminated USA-made wiring harness with clearly labeled connections for hassle-free installation
• Wideband oxygen sensor, gaskets, hardware, and complete installation instructions
• All-new waterproof ECU with faster processor and upgraded Bluetooth chip that measures half the depth of previous models and won't drop connection

E-Tuner 4 Technology:

• Features dyno-developed base calibrations for ready-to-run performance right out of the box, with Bluetooth wireless connection to the ECU's self-learning capability that continually adjusts calibration for maximum performance
• Free E-Tuner 4 app available for download on both Android and Apple iOS devices
• Advanced tuning control over air-fuel ratios, ignition curve, idle speed, acceleration fuel, coolant fans, and rev limiter—all without laptop tuning
• Multiple dashboard displays allow real-time monitoring of engine vitals

Pro-Flo 4 is a complete engineered system that delivers smoother idle, faster acceleration, improved peak power, better fuel economy, and enhanced detonation control—all manageable through the intuitive E-Tuner 4 app.