Flex Fuel Sensor Kit

Kit Includes:

  • ProEFI Flex Fuel Sensor
  • Flex Fuel Flying Lead Cable
  • 3/16″ Heat Shrink – 2qty
  • -6 AN Fitting – 2qty
  • Pins – 2qty


SKU: 9015 Categories: ,


ProEFI Flex Fuel Integration

  • Ignition, fuel, and cold/warm start-up maps are adjusted in real-time, and at the core level of the fueling calculation (not percentage based like some systems try to use) based on ethanol content as seen with the ProEFI Flex Fuel sensor. This is also displayed directly on your CAN Gauge or CAN Display.
  • ProEFI iBoost includes a 5-position switch to choose your 5 pre-determined boost levels (1 being the lowest or wastegate, 5 being the highest allowed given current ethanol content). The ProEFI will AUTOMATICALLY adjust your maximum boost level and corresponding lower boost levels to give you the safest boost level based on the real-time ethanol content.
  • ProEFI firmware allows for an additional 400% increase in fuel for cold start-up maps to GUARANTEE you’ll always have enough fuel to start your car in the cold weather 
  • The internal ProEFI wideband adjusts in real-time for the fluctuating stoichometric measure of your current fuel mixture.

ProEFI FLex Fuel Video.wmv

ProEFI Flex Fuel feedback on a daily driven, 800hp, 10 second Street Supra.


WARNING: It is against the law to install this part on an Emissions Controlled Vehicle

This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles. It is the responsibility of the installer and/or user of this product to ensure compliance with all applicable local and federal laws and regulations. Please check with your local vehicle authority before purchasing, using or installing any Professional EFI Systems Inc. product.


In many states, it is unlawful to tamper with your vehicle’s emissions equipment. Professional EFI Systems Inc. products are designed and sold for sanctioned off-road/competition non-emissions controlled vehicles. Only and may never be used on a public road or highway. Using Professional EFI Systems Inc. products for street/road use on public roads or highways is prohibited by law unless a specific regulatory exemption exists. (more information can be found on for state by state details in the USA)

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