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Not yet available in your market area

Our eFlexFuel direct injection products are not yet available in your market area.

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The stock fuel system of your vehicle lacks the flow capacity to run full E85.

You can’t run full E85 and need to blend it with gas. Our app lets you monitor the fuel blend and gives a warning when the limits of the injectors are reached.

If you already have replaced the fuel injectors please list the modifications on the checkout page. Our technical support will then confirm the injector connectors and verify that there's enough flow capacity for E85.

Please reach out to our customer service for more information

Product Page

Please select your vehicle

Select make, year, model and engine to check compatibility with eFlexFuel products.

Run E85, gasoline, or any blend automatically with eFlexFuel.

The E85 Flex Fuel Conversion Experts, Since 2012.

4.7/5 Trustpilot logo
60,000+ Vehicles converted
1,550,000,000+ Miles with eFlexFuel

Install eFlexFuel, fill up with E85 or gas: it’s that simple.

  • Drive on E85, Gasoline, or any blend of the two
  • Fully Automatic: No tuning, changing maps, or adjustments required
  • “Under-the-hood” installation that doesn’t touch your factory ECU, OBD, or trigger a Check Engine Light
  • We verify your vehicle’s E85 compatibility, including fuel injectors, fuel pump, fuel lines, and any modifications done
  • Comprehensive kits include everything needed to run E85 & DIY install
  • Vehicle specific kits starting at $699
eFlexFuel E85 Kits
E85 in Drifting

Introducing the



E85 performance just got a whole lot easier

  • Install eFlexPro 2, Run E85 & Gain 10-20% HP/TQ
  • DIY Virtual Load Sensor Tuning
  • Experience the VelvetTouch+
  • Supercar Technology in your Daily Driver (or Weekend Warrior)
  • Industry Leading, Free 5-Year Warranty (with product registration)
  • Expertly Engineered, Designed & Manufactured in Finland

ONLY $974

Read more
Fully Automatic Flex FuelAlways Optimized Fully Automatic Flex Fuel
Cooler & Cleaner EngineCooler & Cleaner Engine
No Tuning NeededComplete System, No Tuning Needed
Increase PerformanceUp to 20% Increase in Performance
Flex Fuel System VerifiedYour Fuel System Verified

Follow us #eFlexFuel for the latest & greatest in E85 content!

News, giveaways, and some Corny E85 jokes. (See what we did there?)
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Customer Comments

Recent posts

Can you run E85 Flex Fuel in your 2010-2024 Toyota 4Runner? With an eFlexFuel kit installed you can, and here’s why it’s a good idea.
Can you run E85 Flex Fuel in your 2010-2024 Toyota 4Runner? With an eFlexFuel kit installed you can, and here’s why it’s a good idea.

If you own a 2010-2024 Toyota 4Runner (5th Generation) and you're curious about the benefits of running E85 ethanol fuel, you've come to...

November 1, 2023

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ChrisFix Installs an eFlexPlus in his 2013 Toyota Prius!
ChrisFix Installs an eFlexPlus in his 2013 Toyota Prius!

ChrisFix has helped millions of enthusiasts and DIY’ers fix and modify their cars over the years. With nearly 10 million subscribers on YouTube, ...

August 3, 2023

Read More
Baily’s Hyperformance: Home of the Fastest MOPARs in the World

We first met Chris Baily at the Performance Racing Industry show in Indianapolis, where his World’s Fastest Demon was showcased in the Magnuson S...

May 23, 2023

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eFlexApp for mobile connection

Monitor eFlexFuel devices with eFlexApp

All eFlexFuel kits feature a Bluetooth connection and eFlexApp for your smartphone that allows you to monitor the engine in real-time while driving. See what kind of fuel blend you’re running, adjust cold start settings or toggle between three different engine performance modes: Economy, Sport, and Dynamic. With the eFlexPro, you can use custom E85 tunes created with the eFlexTuner PC software.

About eFlexApp

How does eFlexFuel increase performance and torque?

  • Automatic engine tune adjustment optimizes the engine in real-time to match the fuel blend
  • E85 has 100+ octanes that supports higher compression ratios and greater ignition advance
  • E85 contains a great deal of oxygen for burning: the fuel burns more completely producing more power, less harmful emissions and a cooler engine
  • eFlexPro with its fully customizable fuel maps enables precision engine tuning on E85 resulting in up to 20% horsepower gains
eFlexApp in usage
E85 fuel pump in United States

Over 3,800 E85 flex fuel stations nationwide

Available nationwide, E85 is the highest octane fuel available at the pump. With eFlexFuel your engine can still run on gasoline or any combination of gasoline and ethanol.

Find the nearest E85 pump

What's included in the eFlexPro E85 flex fuel conversion kit

Check out what the eFlexPro E85 flex fuel conversion kit package contains and how eFlexApp works in practice.

Every eFlexFuel kit we deliver is customized for your specific vehicle.

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Approved for pollution controlled vehicles


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