The NEW Ultimate Rebel LS EFI System. Introducing the FiTech Ultimate Rebel LS EFI System – a cutting-edge fuel injection solution that combines high-performance with a sleek and refined design. Building upon the success of the renowned FiTech Ultimate LS EFI System, the Rebel LS takes innovation a step further with its distinctive cleaner profile and enhanced features, making it the ultimate choice for modern engine conversions. Designed for enthusiasts seeking both power and aesthetics, the Ul

Did you know that FiTech EFI systems support E85? All of the seals in our fuel injection systems are made of Viton which are impervious to ethanol corrosion. Be sure that the rest of your fuel system can handle that ethanol and you can run it! Changing the values in your EFI system are easy with our handheld controller under the engine setup section. Change the ethanol content percentage to 85, or if you know the exact ethanol percentage of your gasoline, change it to your exact preference. From