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2015-2020 Charger SRT Hellcat E85 Flex Fuel Kit

Tune Your Hellcat and Increase Your Horsepower By Up To 20%

The 2015 Dodge Charger SRT Hellcat was introduced at the 2014 South Florida International Auto Show in November. It includes the same 707 hp 650 lb. ft. 6.2L supercharged HEMI V8 present in the Dodge Challenger SRT Hellcat. The Charger Hellcat features a redesigned front fascia with a larger lower grille similar to the current generation Dodge Viper. The Hellcat is claimed to be the fastest factory four-door sedan ever built. A heavily upgraded version of the Hellcat was introduced as the Hellcat Redeye for 2021. Like the Challenger Redeye, it is equipped with a supercharged 6.2L V8 rated at 797 hp (594 kW; 808 PS) and 707 lb. ft. torque, an increase of 90 hp and 57 lb. ft. over the standard Hellcat motor. Wanna know how to make it faster? Ethanol can give you an increase of up to 20% with a forced induction engine and an E85 conversion kit.

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


The eFlexPlus and eFlexPro flex-fuel conversion kits are easy to install for the 2015-2020 Charger SRT Hellcat. With these kits, you can start running any mixture of gasoline and ethanol through your 7th generation Charger. The eFlexPro comes with eFlexTuner tuning software so you can tune your Hellcat 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
Engine6.2l / 9 / ESD
Power707 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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