You will need the correct e85 pump and fuel hose. A retune will be required, like dd says you won't get far out of a stock tank as you use a fair bit more e85 over 98ron. It does however make better power, there's a few of us here running e85. There's also the option of flex fuel if your ecu's supports it which means you can have the car tuned for e85 and 98ron and the sensor will even work with a blen of the two and adjust the tune to suit