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2020-2021 Charger RT HEMI 5.7L E85 Conversion Kits

These Plug n’Play Flex Fuel Conversion Kits Increase HP By Up To 12%

The 2011-2021 Charger RT received an improved interior and new exterior styling for the 7th generation. Among the changes were new side scoops along both front and rear doors, more angular headlights, aggressive new grille styling, and a more defined and aerodynamic shape overall. Driver visibility was improved by more than 15% with the new taillight design. This generation did seem to honor the Chargers of the past with its newer, more nostalgic styling. Horsepower for the RT, unfortunately, didn’t see a big jump from generation to generation. That’s okay, though… Our plug n’ play E85 conversion kit can increase your HP by up to 12%.

No tuning required!

$699 List price $874

Starting at $61.50 / month with Affirm logo

Truspilot consumer rating 4.7 SKU: U-EF-PLUS
  • Free shipping
  • Delivery time 2-5 days
  • 5 year warranty with registration


These easy DIY E85 conversion kits, eFlexPlus, and eFlexPro are easy to install and you can start running any mixture of ethanol and gasoline through 7th gen Charger RT. The eFlexPro also allows you to start tuning your Charger with a mixture of E50 or higher.


DIY level

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 & ModelDodge Charger
Engine5.7l / T / EZH / Hemi V8 MDS
Power370 hp
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
Dynamically adjust engine tune to match fuel
Available performance and eco tunes
Select performance or eco tunes via eFlexApp
Create and save custom dyno tunes
Pro grade eFlexTuner tuning software

+ What's included

+ eFlexApp

+ eFlexTuner

+ Installation

+ Returns

+ Warranty

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

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.

Prop 65 Warning
Warning signNot legal for sale or use on pollution-controlled vehicles

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