We need more information about your vehicle. Please send us an inquiry form with your vehicle's identification number (VIN) and we will reply to you directly via email. Thank you!
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.
Select make, year, model and engine to check compatibility with eFlexFuel products.
eFlexFuel E85 Flex Fuel Conversion Kits
eFlexFuel E85 Flex Fuel Conversion Kits
Effortless performance with eFlexPlus E85 Flex Fuel Conversion Kit
Install eFlexPlus, fill up with E85, and Drive – that’s it! It has never been easier (or safer) to harness the performance of E85:
Drive on E85, Gasoline, or any blend of the two
Fully Automatic: No tuning, changing maps, or adjustments required
Choose between Eco, Dynamic, & Sport Driving Modes, adjust cold-start fueling, monitor Ethanol content and Duty Cycle, and more via smartphone with our eFlexApp
“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
Everything needed to run E85 & DIY install is included
Make more power, lower operating temperatures, and reduce emissions on E85!
The eFlexPlus E85 flex fuel kit automatically adjusts and optimizes fueling based on the E85 mix in your tank, eliminating knock and maximizing engine performance in the process. eFlexPlus is the easiest way to convert your vehicle to a true flex fuel, E85-or-Gasoline capable vehicle. You will make more power with our eFlexPlus kit, however for those looking to fine tune their fueling, we recommend taking a look at our eFlexPro kit.
Install eFlexPro 2, Run E85 & Gain 10-20% HP/TQ
Simply install the eFlexPro 2 and you're ready to start pumping E85 into your tank to make more HP/TQ. You'll see significant power gains running our default driving modes, but take things to another level with safe DIY tuning to optimize Ethanol performance for your specific vehicle.
The eFlexPro includes all eFlexPlus features in addition to the following Pro-only features
Improved fuel control capabilities
Upgraded Control Unit hardware
Upgraded wiring harness with two optional 0-5V Analog Inputs
Patent pending Virtual Load Sensor - no tapping into an external load sensor required!
Connect your aftermarket wideband sensor to datalog and create E85 specific fueling maps
Detailed Ethanol AFR tuning via our eFlexTuner Windows software
Install eFlexPlus Direct, fill up with E85, and Drive – that’s it! It has never been easier (or safer) to harness the performance of E85:
Drive on E85, Gasoline, or any blend of the two
Fully Automatic: No tuning, changing maps, or adjustments required
Monitor Ethanol content and Duty Cycle, and more via smartphone with our eFlexApp
“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
Everything needed to run E85 & DIY install is included
Run high octane fuel, lower operating temperatures, and reduce emissions on E85!
The eFlexPlus Direct E85 flex fuel kit automatically adjusts and optimizes fueling based on the E85 mix in your tank, eliminating knock and maximizing engine performance in the process. eFlexPlus Direct is the easiest way to convert your vehicle to a true flex fuel, E85-or-Gasoline capable vehicle.
NOTE: Additional aftermarket modifications may inhibit proper operation. Due to fuel system complexity, the eFlexPlus Direct is ONLY compatible with unmodified / stock engines for the application. If you have questions about compatibility, please contact our Customer Support at 833-539-3835 or support.eflexfuel.com.
eFlexPlus Sensor
Install eFlexPlus Sensor, fill up with E85, and Drive – that’s it! It has never been easier (or safer) to harness the performance of E85:
Drive on E85, Gasoline, or any blend of the two
Fully Automatic: No tuning, changing maps, or adjustments required
Monitor Ethanol content and Duty Cycle, and more via smartphone with our eFlexApp
“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
Everything needed to run E85 & DIY install is included
Run high octane fuel, lower operating temperatures, and reduce emissions on E85!
The eFlexPlus Sensor E85 flex fuel kit automatically adjusts and optimizes fueling based on the E85 mix in your tank, eliminating knock and maximizing engine performance in the process. eFlexPlus Sensor is the easiest way to convert your vehicle to a true flex fuel, E85-or-Gasoline capable vehicle.
NOTE: Additional aftermarket modifications may inhibit proper operation. Due to fuel system complexity, the eFlexPlus Sesnor is ONLY compatible with unmodified / stock engines for the application. If you have questions about compatibility, please contact our Customer Support at 833-539-3835 or support.eflexfuel.com.
eFlexV10+ for over 8-cylinder vehicles
Install eFlexV10+, fill up with E85, and Drive – that’s it! It has never been easier (or safer) to harness the performance of E85:
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
Everything needed to run E85 & DIY install is included
Make more power, lower operating temperatures, and reduce emissions on E85!
Please note that the eFlexV10+ has limited eFlexApp features: it is not possible to use the control features (driving modes, cold start control). Bluetooth connection is only possible to one controller at a time.
eFlexV10+ includes 2 controllers, 2 wiring harnesses (max. 16-cyl), and one ethanol sensor with accessories.
eFlexV10+ shipping time is 7-10 workdays from order.
+Have an aftermarket wideband?
If YES, we strongly recommend our eFlexPro system. Your aftermarket wideband can be connected directly into the eFlexPro harness to fine-tune fueling and dial in ethanol AFR’s with our free eFlexTuner Windows software. Select the eFlexPro drop-down to learn more.
+Vehicles with larger injectors or big power-adders
Vehicles with upgraded injectors and/or big power adders (aftermarket forced induction, cams, etc.) are recommended to go with our eflexpro kit for detailed fine-tuning and fueling capabilities.
This vehicle needs a custom wiring harness. Your kit will be shipped within five business days.
Free shipping
Delivery time 2-5 days
5 year warranty with registration
Installation
Plug&Play installation - An experienced mechanic will install in 1h-2h. For first time DIY installation, expect to double the time needed.
Technical specs
Make & Model
Year
Engine
Power
Always Optimized Fully Automatic Flex Fuel
Cooler & Cleaner Engine
Up to 20% Increase in Performance
Complete System, No Tuning Needed
Complete System, No Tuning Needed
Up to 20% Increase in Performance
Your Fuel System Verified
eFlexFuel + E85 Vs. Gas Dyno Results
MOPAR (Chrysler, Dodge, Jeep, Ram)
Nissan / Infiniti
Honda / Acura
Honda Civic
Acura
Chevrolet / GMC / Cadillac
Subaru
Toyota
Toyota Tundra
Toyota Sienna
Mercedes-Benz
BMW S1000RR (moto)
Peak power gains do not always tell the whole story! It's important to look at power gains across the entire RPM range / dyno curve, A.K.A. power "under the curve." Power gains under the curve will have a greater impact on driving experience. This is because gains under the curve impact the broader usable powerband, whereas peak power is momentary - only at one point in the RPM range.
If peak gains are 5% while max gains under the curve show 20%, this +20% increase is a better reflection of how your driving experience will change (you'll certainly feel that increase!). You want to feel the difference in the seat of your pants, and this is where power under the curve plays usually the biggest role.
+Why use E85?
PERFORMANCE: E85 is the best bang-for-buck performance upgrade you can make without compromising your vehicle’s ECU programming. Depending on application, max HP gains can be up to 20%, though the real gains are felt throughout the entire powerband.
SAVINGS: E85 is lower cost than gasoline. While your MPG may be impacted when running E85, your cost per mile will end up cheaper with this locally produced fuel.
ENVIRONMENT: Modern day E85 is significantly cleaner and lower carbon than gasoline. Using E85 instead of gasoline will considerably reduce your carbon footprint and help protect the environment.
+How is vehicle compatibility confirmed?
We confirm full compatibility with eFlexFuel systems and E85 for all kits that we offer. If your vehicle is approved and a kit is available, this means the injectors, fuel pump and fuel lines will be compatible with E85 once an eFlexFuel kit is installed. With over 65,000 eFlexFuel customers worldwide, we pride ourselves on our E85 and flex-fuel expertise.
+Where does the increased horsepower, torque, and performance come from?
E85 is approximately 30% oxygen by weight, while normal gasoline is anywhere from 0-3.5% oxygen. Greater fuel oxygenation means more fuel and more complete combustion, leading to more power.
Ethanol absorbs heat during vaporization, leading to reduced air temperatures when the air-fuel mixture ignites. This charge cooling effect creates a modest power increase while supporting ethanol’s knock resistance.
The higher chemical octane of E85 reduces the risk of knock. When combined with ethanol’s charge cooling effect, E85 is highly knock resistant, with virtually zero knock under normal operating conditions; the same cannot be said for gasoline. As a result, the vehicle’s ECU does not need to retard ignition (pull timing) while running E85.
Easily & safely create custom ethanol fuel maps based on your own vehicle's performance & modifications, without tapping into external load sensors - all from your laptop. Now you can augment your Ethanol fueling yourself, without touching your factory ECU and without jeopardizing engine safety.
Experience the VelvetTouch+
VelvetTouch+ is the first-class signal processing technology developed by eFlexFuel. This technology ensures that the eFlexFuel system works in any engine, environment and conditions without interfering in any way with the operation of the vehicle. It also ensures that there is no signal interference that could disrupt vehicle systems. VelvetTouch+ allows you to convert your vehicle to E85 in complete safety. Whether you drive on ethanol or gasoline.
Supercar Technology in your Daily Driver (or Weekend Warrior)
By installing the eFlexFuel kit, you're in good company. eFlexFuel conversion kits utilize technology found in the Koenigsegg Jesko, Dodge Challenger SRT Demon 170, and other top-tier performance vehicles. This tech is used to get the most out of E85, Gasoline, or whatever blend of the two you have in your tank.
Industry Leading, Free 5-Year Warranty (With product registration)
Nothing says, "We stand behind our product," like our free 5-Year warranty. We know what our kits are made of and we aren't afraid to put our money where our mouth is. You will not find a warranty like this anywhere else.
Expertly Engineered, Designed & Manufactured in Finland
Expertly Engineered, Designed & Manufactured in Finland. We have developed our hardware & software in-house in Pirkkala, Finland, since day one. Before shipping, we confirm every single control unit's functionality before shipping.
Technical Specs & Features
Precise Ethanol Content real-time measured over 100 times per second
Advanced signal processing filtering system in all input signals
Shock-Proof & Weather Proof casing
High Quality Wiring Harness with snap in connectors
Please confirm device versions features at eFlexApp page
eFlexTuner Main Features
3D Fuel Maps
With eFlexFuel's Pro models, fuel maps can be observed in the 3D graphics window. The view can be rotated freely and selected fuel map cells are highlighted over the 3D map. The color-coded fuel map makes analysis simple.
Data Logging
All running parameters of the control unit can be captured and saved to a log file. Choose which parameters to display including date range. eFlexPro and eFlexMoto Pro log files can be analyzed in-depth with the eFlexTuner. Color-coding helps distinguish data points. (For example, the fuel mixture or the injector duty cycle.)
Log File Analysis
eFlexPro and eFlexMoto Pro log files can be analyzed in depth with the eFlexTuner. Data can be taken from an entire session or a specific timespan. The data is color-coded, which helps to distinguish e.g., the fuel mixture or the injector duty cycle.
Cold enrichment custom setting (created with eFlexTuner) 2 3 4
Save RPM based enrichment with driving mode selection (created with eFlexTuner) 2 3 4
1
3
eFlexPro view for analog data
eFlexTuner
RPM based 2D fuel map 3 4
Fault codes 3
Cold start adjustment 3 4
Data logging 3
OBD2 connectibity 5 6
Autotuner 2 3 4 6
3D fuel map
2D map for external sensor
Log analyzer (4D scatter plot)
Sensor editor for user-defined sensors
Presets for most common AFR gauges
Virtual Load Sensor Tuning (eFlexPro 2)
1 VelvetTouch+ is the first-class signal processing technology developed by eFlexFuel. This technology ensures that the eFlexFuel system works in any engine, environment and conditions without interfering in any way with the operation of the vehicle. It also ensures that there is no signal interference that could disrupt vehicle systems. VelvetTouch+ allows you to convert your vehicle to E85 in complete safety. Whether you drive on ethanol or gasoline.
2 Does not include in eFlexPlus Direct.
3 Does not include in eFlexV10+.
4 Does not include in eFlexPlus Sensor.
5 Supports most Bluetooth OBD2 adapters (ELM327-protocol), for example OBDLink LX / MX+.
6 Requires Bluetooth OBD2 adapter for closed loop tuning and Wideband AFR gauge for open loop.
+What's included
Control unit (3” x 5 1/5” x 1” in) x 2
Ethanol sensor
Wiring harness specific to your vehicle with an external temperature sensor x 2
Two additional analog inputs that plug in to the engine’s own sensors (MAP, MAF, TPS or WBO) - included only in eFlexPro
General Installation and User Guide is included in the product package.
+Returns
We always verify compatibility of the purchased product with the customer’s vehicle, so you don’t need to return or exchange your kit. If you must return or exchange your purchase, please contact us within 30 days of receiving your order. Your intent to return must be in writing, include a reason for return and sent to our support. Please include your reason for return/exchange.
The team at eFlexFuel will then issue a return authorization number (RMA) and shipping instructions. All returns are subject to a $100 restocking fee. This restock fee is simply to help us cover freight costs (we offer free outbound shipping and will provide you with a return label), processing fees, product inspection & repackaging, and restocking time.
Note: eFlexFuel and E85 are compatible with stock and modified vehicles. If your vehicle is modified, list all engine-related mods during checkout. Our technical team will ensure full compatibility with eFlexFuel and E85 prior to shipping.
Not legal for sale or use on pollution-controlled vehicles
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We’re here to help!
Not sure if your vehicle is compatible, which engine option to select, or can’t find your vehicle on the list? Send us a compatibility inquiry and we’ll get back to you as soon as possible.
eFlexFuel products are not suitable for diesel or carburetor engines!
Your information will not be used for commercial or marketing purposes.
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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.
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Want to run E85?To learn if your vehicle is eFlexFuel Approved! Click here
Need more help? Call us on 1-833-539-3835 or visit our support page to find answers and contact us via our contact form.
SKU: U-EF-PLUS Availability: In stock 
Not legal for sale or use on pollution-controlled vehicles
