Edelbrock Pro Flo 4 XT EFI System Seq Port BB Chrysler RB 413-440ci 625 Max HP 35lb/hr Black Finish

If you're looking to upgrade your big-block Chrysler RB engine—whether it's a 413, 426, or 440 cubic inch—this Edelbrock Pro-Flo 4 XT Sequential Port EFI system is a comprehensive solution. It replaces your carburetor and intake with a modern fuel injection setup, designed to improve throttle response and overall engine performance. This system is built for a wide range of Chrysler and Dodge vehicles from the late 1950s through the late 1970s, including models like the Chrysler New Yorker, Dodge Charger, and Dodge D300 trucks.

The Pro-Flo 4 XT system includes a black powder-coated intake manifold that comes pre-assembled with high-flow 35 Lb/Hr injectors, fuel rails, and a 90mm throttle body. The manifold itself is designed with a large plenum and long runners, which is beneficial for high-horsepower and larger displacement engines like yours. It also features a new, more compact, and waterproof ECU with an upgraded Bluetooth chip for a more reliable wireless connection to the E-Tuner 4 app. This app, available for Android and iOS devices, allows for self-learning calibration adjustments, control over air-fuel ratios, ignition timing, idle speed, and more, all without needing a laptop. The system comes with a fully terminated, plug-and-play harness with clearly labeled connections to simplify installation.

This kit is rated for up to 550 horsepower with 58 PSI of fuel pressure, and the injectors are capable of supporting that output. The system includes multiple pre-loaded, dyno-developed calibrations to get you started, and the E-Tuner 4 app's setup wizard makes it easy to fine-tune your engine's performance. You can monitor engine vitals directly from your smartphone or tablet.