Adding flex fuel capability is an excellent way to add performance and power. Utilizing an OEM GM E85 sensor, we provide a kit including a harness pigtail and also options for -6 or -8 Male AN fuel fitting adapters for easy installation. Once installed and tuned, this kit allows your ECM to automatically sense E85 and adjust fuel ratios accordingly for seamless performance. No more emptying a tank to ensure fuel percentages, this does all of the hard work for you. Whether you are running all E85, all gasoline, half and half or anything in between, the sensor sorts it out easily!