transform your performance
with the E85 conversion kit

The eFlexPlus conversion kit is designed for drivers who aren’t tuning pros, but want a better performance out of their vehicle. eFlexPlus provides you with an easy avenue for basic engine optimization with access to a more sophisticated version of our eFlexApp and eFlexTuner software.


Includes FREE delivery

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

Adjustable solution for various driving conditions

For those who aren’t interested in digging into the depths of tuning their engine, eFlexPlus offers an easy solution. eFlexApp allows you to choose from three driving modes: Eco, Dynamic and Sport. Benefit fully from the performance of high-octane E85.

Economy and performance

With the help of eFlexPlus, you can fine-tune your engine running on ethanol fuel. You can change the air-fuel-mixture at different RPM levels to improve engine performance and economy. Take full advantage of increased engine performance.

Fully adjustable cold start

Automatic cold start technology adjusts the engine start-up based on the fuel ethanol content and engine temperature. Fine-tune the start-up settings with 5 pre-sets in eFlexApp, or fully personalize and save custom profiles with eFlexTuner software.


eFlexApp can monitor your eFlexPlus device in real time. Choose from between three separate driving modes (Economy, Dynamic, Sport) and monitor the ethanol content, engine RPM, fuel temperature, engine temperature, injector duty cycle, injector activity and cold enrichment.

Adjust the RPM based enrichment with the driving mode selection (save the custom driving mode setting created with eFlexTuner software) and cold enrichment (save the custom setting created with eFlexTuner software)

Available via APP Store and Google Play.


Use eFlexTuner to adjust the RPM based enrichment and cold start enrichment. Save your custom settings to eFlexApp. Learn more here

The E85 conversion kit package content

Vehicle specific conversion kit includes everything needed for DIY installation:

  • eFlexPlus control unit
  • Ethanol sensor
  • User manual with installation instructions
    • Wiring harness with a temperature sensor (for 1-8 cylinders)
    • Cable ties
    • Male connectors (10 pieces)
  • Fuel hose 40 inches
  • 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 a fault code memory
  • External temperature sensor
  • Waterproof control unit (IP68)
  • Control unit size (3” x 5 1/5” x 1”)
  • Two (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