Advanced Fuel Dynamics realized that the only way to consistently make the most power from ethanol is to build a true performance flex-fuel system. ProFlex Commander is a plug-and-play (full bolt-on) E85 flex-fuel system that allows you to immediately start making more power by running E85. No tuning required. Their flex fuel system allows a vehicle to run E85, gas, or any blend of ethanol and gas seamlessly without any user input required. Advanced Fuel Dynamics has grown from a one-man shop to a company with high-quality full bolt-on products and a growing list of vehicle applications. Their products have been rigorously tested on the track and street.