FiTech Fuel Injection 37003 Retro LS Port 750HP EFI System Classic Gold with Cast LS3 Intake

The FiTech 37003 Retro LS Port 750HP EFI System delivers exceptional performance for LS3 engines with rectangular port heads, combining modern fuel injection technology with classic styling. This comprehensive system supports up to 750 horsepower on gasoline and is compatible with boost or nitrous applications.

Key Features:

• Cast aluminum intake manifold designed specifically for rectangular port LS3 cylinder heads
• Classic Gold throttle body with 4150-style bolt pattern for retro aesthetics
• Billet fuel rails with eight 55 lb/hr fuel injectors for precise fuel delivery and efficient atomization
• Self-learning ECU with user tunable software and laptop programming capability
• Built-in transmission control for GM 4L60E-4L85E automatic transmissions
• Complete wiring harness, dual O2 sensors, MAP sensor, TPS, and IAC included
• Compatible with 24x or 58x crankshaft reluctor wheels
• E85 compatible and boost ready for forced induction applications
• -6 AN and -8 AN fuel fittings and fuel pressure regulator included

This all-inclusive kit provides everything needed for a seamless installation, eliminating the need for standalone transmission controllers or additional components. The self-tuning capability simplifies setup while allowing experienced users to fine-tune parameters for optimal performance.