The TFI Techlusion Fuel Injection tuner is a Gen 2 Electronic Fuel Injection controller. The real technology behind the TFI is that it functions like a carburetor. It takes the knowledge and experience that many of us have, and converts it to a fuel injection interface. The TFI is a piggy-back EFI controller because it does not replace the stock ECU, but rather monitors the signals to the injectors and makes fuel adjustments based on the pot settings. The TFI is equipped with four pots which allow for quick fine tuning by the end user without needing a computer. If you are looking for a simple device to maximize your vehicle's performance with a performance exhaust and/or performance air cleaner then put the TFI on today. Not suitable for use with Big Bore cylinders and/or stroker crankshafts.