The eFlexPro conversion kit is designed for auto enthusiasts and professional drivers. The possibilities are endless with the first-ever flex fuel convertor with fully customizable fuel maps (patent pending), one that can be connected to two external engine sensors. With eFlexPro, you can optimize your vehicle as you wish.


Includes FREE delivery

Available in stock — This item usually ships within 24 hrs during business days

Tuning to Perfection

Take your engine’s performance to the next level with E85 fuel and the eFlexPro conversion kit. Connect up to two engine sensors and tune fuel injection with the a 3D fuel map using eFlexTuner software. Improve your engine performance by as much as 15%.

DIY Engine Optimization

Connect to an external wideband lambda controller and optimize the air-fuel-ratio to perfection based on the engine load and RPM. With eFlexTuner software, control is in your hands with log files and tools for analysis. eFlexPro does not alter the original engine sensor data and all of the OEM engine safety features remain fully functional.

Custom Tunes

Control your own tuning by saving multiple custom tunes that can be switched in and out according to your different driving conditions. eFlexApp allows you to save three of your own tuning.


eFlexApp can monitor your eFlexPro in real time. Choose your driving mode, monitor the ethanol content, engine RPM, fuel temperature, engine temperature, injector duty cycle, injector activity, engine and fuel temperature, and cold enrichment.

Available via APP Store and Google Play.


Use eFlexTuner to adjust the engine load and RPM based enrichment with 3D fuel maps. Adjust further cold start enrichment. Save up to three custom settings to eFlexApp.

Package content

The vehicle specific conversion kit includes everything needed for DIY installation:

  • eFlexPro control unit
  • Ethanol sensor
  • User manual with installation instructions
  • Wiring harness with a temperature sensor and two additional sensor wires (for 1-8 cylinders)
  • Cable ties
  • Male connectors (10 pieces)
  • Fuel hose 40”
  • Fuel line quick connectors
  • Hose clamps
  • Tools for detaching the fuel line

Technical specification

  • 1-8 injector channels
  • Ethanol content detection
  • Automatic cold start
  • Wireless connection via Bluetooth LE 
  • Free eFlexFuel app
  • Self-diagnosis with fault code memory
  • External temperature sensor
  • Waterproof control unit (IP68)
  • Control unit size (3” x 5 1/5” x 1”)
  • 2-year limited warranty
  • Free product support
  • Designed and manufactured in Finland, EU

Pending U.S. emissions certification; your eFlexFuel™ system is sold only for competition and off-road use.


From sustainability to performance or power, it doesn’t matter where your automotive interests lie, we have an eFlexFuel product for you

Transform Your Carbon Footprint


Engineered for the environmentally and cost-conscious driver, the switch to E85 has never been easier or more affordable. Learn more

Transform Your Peformance


Engineered for the driver looking for extra performance and control, do more with access to our eFlexApp and eFlexTuner. Learn more

Transform Your Power


Engineered for the enthusiast, take full control with real-time mobile adjustments, tuning plus custom fuel maps and logging. Learn more