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Product PageThe 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 PageSelect make, year, model and engine to check compatibility with eFlexFuel products.
Curious about E85 conversion? Hear it straight from influencers who made the switch.
ONLY $999
Read moreWe’re excited to officially announce the release of eFlexGauge Core, the latest addition to the eFlexFuel ecosystem. Designed for drivers, tuners, and builders who demand accurate ethanol data without complexity. eFlexGauge Core delivers real‑time E85 insights directly to your smartphone — and your ECU.
Whether you’re daily‑driving on flex fuel, tuning a performance build, or simply want to know exactly what’s in your tank, eFlexGauge Core puts reliable ethanol data at your fingertips.
Notice! This is not an E85 conversion kit!
Price starting at $199
Buy Now
News, giveaways, and some Corny E85 jokes. (See what we did there?)
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E85 is cheaper than gas but due to its chemical composition, it also gets lower MPG. So which fuel is actually more economical to run?...
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At eFlexFuel, eFlex isn’t just a product name — it’s the foundation of our entire technology ecosystem. It’s the common DNA shared across e...
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Real dyno results prove it: eFlexFuel E85 kits unlock hidden horsepower. This supercharged Tundra gained +44 WHP instantly. See if your vehicle qualif...
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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.
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 pumpCheck 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.
Select your vehicle
At the moment, we are experiencing a high volume of orders. As a result, order processing times are currently 3-5 working days. We respond to support messages as quickly as possible. We apologise for the delay and thank you for your understanding.
Our support site answers many common questions, so we recommend checking it before contacting us.
