Edelbrock 35733 Pro-Flo 4 XT Sequential Port EFI System for LS Gen III/IV

The Edelbrock 35733 Pro-Flo 4 XT Sequential Port EFI System delivers cutting-edge fuel injection technology for Chevrolet LS Gen III/IV engines with cathedral port heads. This complete engineered system combines a high-performance Pro-Flo XT intake manifold with advanced ECU technology to provide up to 550 horsepower capability without the complexity of laptop tuning.

Complete System Includes:

• Pro-Flo XT cathedral port intake manifold with black powdercoat finish
• 35 lb/hr fuel injectors capable of 550 HP at 58 PSI fuel pressure
• 90mm throttle body for maximum airflow
• Next-generation waterproof ECU with faster processor
• Fully assembled wiring harness with pre-terminated, labeled connectors
• Edelbrock distributor and wideband oxygen sensor
• 7-inch Android tablet with E-Tuner 4 app pre-installed
• Gaskets, hardware, and installation instructions

Advanced ECU Technology:

• Waterproof design measuring half the depth of previous models
• Upgraded Bluetooth chip for reliable, dropout-free connectivity
• Pre-loaded with 80 dyno-developed calibrations for instant performance
• Self-learning capability continuously adjusts for optimal engine performance
• Control air-fuel ratios, ignition curves, idle speed, acceleration fuel, coolant fans, and rev limiter

E-Tuner 4 App Features:

• Free download available for Android and iOS devices
• Intuitive setup wizard for easy initial configuration
• Real-time engine monitoring with customizable dash displays
• Bluetooth wireless communication with ECU
• No laptop tuning required—control everything from your smartphone or tablet

The Pro-Flo 4 system features sequential multi-port fuel injection, mounting individual injectors directly on the intake manifold for superior fuel atomization and distribution compared to throttle body systems. This design ensures optimal performance, fuel economy, and throttle response. The system is now boost-compatible up to 15 PSI with the optional 2.5-bar TMAP sensor and free firmware update from Edelbrock.

Note: A high-pressure EFI fuel delivery system is required for installation and sold separately. Professional installation recommended due to electrical and mechanical complexity.