If you already have or Stage 0 tuning system and access to E85 fuel in your area then our Flex fuel upgrade should be one of the first performance upgrades on your list. Our system utilizes a true ethanol sensor and includes everything you need to quickly and easily install the components in about 30 minutes. After we update your engine calibration to utilize the signal from the ethanol composition you can use gasoline, E85 or any ratio of the two and the ecm will automatically re-calibrate to maximize your performance for the amount of ethanol detected. Includes ethanol sensor, flex fuel hose, wiring harness, and custom flex fuel tune update. On E85 fuel we typically see peak power of ~ 309 hp / 332 lb-ft on stock vehicles and higher gains are possible when combined with our 67mm turbo upgrade.