Edelbrock Pro-Flo 4 XT Sequential Port EFI System for Big-Block Chevy Engines Part #35873

The Edelbrock part #35873 Pro-Flo 4 XT Sequential Port EFI System for Big-Block Chevy Rectangle Port engines has the latest in technology and features. The EFI system comes complete with a black finish Pro-Flo XT intake manifold and 35 Lb/Hr injectors capable of 550 HP with 58 p.s.i. fuel pressure. Also included is a plug and play single connection distributor designed to work specifically with Pro-Flo 4 and a made in the USA fully terminated high-quality harness with clearly labeled connections for a hassle-free installation. The new Pro-Flo 4 EFI systems feature an all-new ECU with a faster processor, a water proof design and is half the depth of the previous ECU. It also has an upgraded Bluetooth chip that is faster, more reliable and will not drop connection. We've added more features for the advanced tuner giving you control over air-fuel ratios, ignition curve, idle speed, acceleration fuel, coolant fans, Rev limiter while retaining the simplicity Pro-Flo is known for. The key to the system is our exclusive E-Tuner 4 app with dyno developed base calibrations. The E-Tuner 4 app uses a Bluetooth wireless connection to communicate with the ECU's self-learning capability to continually adjust the calibration to get maximum performance. E-Tuner 4 features a simple and easy to use setup wizard to help you get started. Best of all, the E-Tuner 4 app is free and can be downloaded from the Google Play Store, allowing you to use an Android based smart phone or tablet. If you don't have a compatible device, then we also offer kits that include a 7" Android tablet with the E-Tuner 4 app pre-installed. Multiple dash displays are included to allow you to monitor engine vitals from an Android smart phone or tablet.Pro-Flo 4 does not require laptop tuning. Edelbrock Pro-Flo 4 XT Sequential Port EFI System for Big-Block Chevy Rectangle Port engines. The system comes complete with a Pro-Flo XT black finish intake manifold and 35 Lb/Hr injectors capable of 550 HP with 58 p.s.i. fuel pressure. Chevrolet:Big-Block Mark IV:396 (6.6L)/402 (6.6L)/427 (7.0L)/454 (7.4L)

• New ECU Preloaded w/80 Dyno-Tuned Calibrations

The Edelbrock Pro-Flo 4 XT Sequential Port EFI System (Part #35873) is designed specifically for Big-Block Chevy Rectangle Port engines, offering advanced technology and reliable performance. This comprehensive system includes a black finish Pro-Flo XT intake manifold and 35 lb/hr injectors capable of supporting up to 550 horsepower at 58 psi fuel pressure. The system's components are engineered for seamless integration and optimal engine performance, making it an ideal upgrade for classic and performance-oriented applications. The included plug-and-play single connection distributor is tailored to work exclusively with the Pro-Flo 4 system, simplifying installation. Additionally, the fully terminated, USA-made harness features clearly labeled connections, reducing setup time and ensuring a secure fit. The system’s new ECU boasts a faster processor, water-proof design, and reduced size, while an upgraded Bluetooth chip provides a more reliable connection. These enhancements give experienced tuners more control over air-fuel ratios, ignition curves, idle speed, acceleration fuel, coolant fans, and rev limits—all within the familiar Pro-Flo platform. Central to the system's usability is the free E-Tuner 4 app, which communicates wirelessly via Bluetooth and utilizes dyno-developed base calibrations. The app’s intuitive setup wizard guides users through initial configuration, making tuning accessible even for those new to EFI systems. The E-Tuner 4 app is compatible with Android smartphones and tablets, and optional kits include a 7-inch Android tablet pre-installed with the app for added convenience. Multiple dash displays are also available for real-time engine monitoring from your mobile device, eliminating the need for laptop tuning. Crafted for 1976-1978 GMC K25 Suburban models with specific Big-Block Chevy engines, this EFI system delivers precision control and high performance, backed by Edelbrock’s reputation for quality and innovation.

Features:

• Complete EFI system with black finish Pro-Flo XT intake manifold and 35 lb/hr injectors supporting up to 550 HP

• Advanced ECU with faster processor, waterproof design, and half the size of previous models

• Upgraded Bluetooth chip for reliable wireless communication

• Fully terminated, USA-made wiring harness with clearly labeled connections for easy installation

• Includes plug-and-play distributor designed specifically for Pro-Flo 4 systems

• Dyno-developed base calibrations accessible through free E-Tuner 4 app

• Wireless Bluetooth connectivity with Android device compatibility and optional Android tablet kit

• User-friendly setup wizard for quick configuration without laptop tuning

• Multiple engine monitoring dash displays for real-time data from mobile devices

• Designed for Big-Block Chevy Rectangle Port engines, including 396, 402, 427, and 454 cubic inch displacement