Advanced Fuel Dynamics manufactures a plug-in aftermarket flexfuel unit that allows vehicles to run the widely-available biofuel E85 – or any mixture of gasoline and ethanol – dramatically increasing performance and reducing harmful emissions at the same time. Our unit works without the need for a replacement vehicle computer, manual selection of fuels, or tuning. It is easy to install and works right out of the box for automotive, marine, and powersports applications. Access instant E85 performance gains while maintaining the ability to always choose your fuel.