B3R Flex Fuel Sensor Kit

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B3R flex fuel sensor kit for Holley EFI, includes harness and GM flex fuel sensor. Allows easy flex fuel setup with Holley EFI/Gateway systems. Use these kits to add the ability to run anything from straight gasoline to straight ethanol as well as reveal the true power potential of your setup. Forced induction scenarios especially benefit from the use of ethanol, and these allow you to seamlessly switch between gasoline and ethanol without having to monitor your fuel content or reflash your tune. Show more