2014-2021 Challenger SRT8 HEMI 6.4L E85 Kits
Convert Your Challenger SRT8 to E85 and Increase HP by Up To 12%
The 2014-2021 Challenger SRT8 has a 6.4L HEMI that’s capable of 485 HP out of the box and it’s naturally aspirated. It produces 475lb. ft. torque which makes it pretty explosive off the line and a real contender in its weight class. It’s hard to believe that there is a plug ‘n play option that converts the SRT8 from gasoline to E85, increasing its horsepower by up to 12%.
No tuning required!
$749Starting at $61.50 / month with 
SKU: U-EF-PLUS - Free shipping
- Delivery time 2-5 days
- 5 year warranty with registration
Introduction
Our E85 conversion kits, eFlexPlus, and eFlexPro are plug n’ play, easy to install, and you can start running any mixture of E85 that you see fit for your 2014-2021 Dodge Challenger SRT8 immediately. And with the eFlexPro, you can start tuning your Challenger SRT8 HEMI with a mixture of E50 or higher.
Installation
Plug&Play installation with some modifications - An experienced mechanic will install in 2-3h. For first time DIY installation, expect to double the time needed.
Technical specs
| Make & Model | Dodge Challenger |
| Years | 2014-2021 |
| Engine | 6.4l / ESG / ESH / Hemi V8 |
| Power | 470 hp |
Always Optimized Fully Automatic Flex Fuel
Cooler & Cleaner Engine
Complete System, No Tuning Needed
Up to 10% Increase in Performance 
Your Fuel System VerifiedDIY Virtual Load Sensor Tuning
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+
All eFlexFuel devices provide smoother and more seamless drivability than any other flex fuel system in existence. No small feat, our R&D team accomplished this with unrivaled attention to detail, countless long days & late nights, and a unique eye for optimization. The result of this "Velvet Touch" development? Our class-defining eFlexPro 2 & eFlexPlus.
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 (no soldering required)
- Ethanol Tested & Approved fuel accessories (line, clamps, quick-connectors)
- Bluetooth 5.2
eFlexApp Main Features
Dynamic Gauge Screen
with Key Information
Choose Your Driving Mode
Dyno Proven Power Gain
Real-time Analog Data
for Sensor Inputs
Log History
with Real-Time Parameters
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.
Please confirm device versions features at eFlexTuner page
+ Compare products
 |  | |
|---|---|---|
| Features | ||
| VelvetTouch+ | ||
| Free 5-Year Warranty (with registration) | ||
| 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 (no soldering required) | ||
| Ethanol Tested & Approved fuel accessories (line, clamps, quick-connectors) | ||
| Bluetooth 5.2 | ||
| Analog Wires for External Sensors | ||
| eFlexApp | ||
| Ethanol content | ||
| Engine RPM | ||
| Duty cycle | ||
| Fuel temperature | ||
| Ambient engine temperature | ||
| Injector activity | ||
| Cold enrichment | ||
| Device status | ||
| Driving mode selection | ||
| Cold enrichment custom setting (created with eFlexTuner) | ||
| Save RPM based enrichment with driving mode selection (created with eFlexTuner) | 1 | 3 |
| eFlexPro view for analog data | ||
| eFlexTuner | ||
| RPM. based 2D fuel map | ||
| Fault codes | ||
| Data logging | ||
| Fuel map adjustment | ||
| Log file analysis | ||
| 3D fuel maps | ||
| Sensor linkage | ||
| Cold start adjustment | ||
| Virtual Load Sensor Tuning |
+ What's included
+ Installation
+ Returns
+ Warranty
Testimonial
Installation
What's included in the eFlexPro E85 flex fuel conversion kit
Customer Comments
Note: If your car is modified you can use E85 with eFlexFuel. If this is the case, please list all the main engine modifications on the checkout page. Our technical team will ensure that your setup is fit for E85.
* Power and torque increase depends on your engine technology and/or your custom built of the engine.
Not legal for sale or use on pollution-controlled vehicles