Edelbrock Pro-Flo 2 EFI conversion kits arrive with all the necessary components to upgrade your Edelbrock first-generation Pro-Flo fuel injection system to a more powerful second-generation Pro-Flo 2. Upgrade to improved fuel economy and incredible horsepower with more tuning features from your new "flash-programmable" engine control unit (ECU) powered by EFI Technology, a leader in advanced electronic engine management and monitoring systems. With these conversion kits you'll be offered fully sequential injector firing, limitless calibrations with user-friendly preloaded software and an exclusive hand-held calibration module that makes it possible to tune with or without a laptop plus two tuning methods; speed density or alpha-N. These EFI conversion kits also include a narrow band O2 sensor, complete wiring harness, installation instructions and necessary hardware for a hassle-free task. A more powerful, complete, fully-sequential EFI system is yours with American-made Edelbrock Pro-Flo 2 EFI conversion kits.