2008-2013 Infiniti G37 E85 Conversion Kits

Improve Horsepower with eFlexPlus and eFlexPro

In 2008 the Infiniti G37 replaced its wildly popular predecessor with enhanced styling, amenities, and increased horsepower with a 3.7L V6. Immediately upon its arrival on the luxury car market, this model was very well received by Infiniti G Series fans that were looking forward to the boost in horsepower from 306 to 330. Since 2013, the last model year of the G37, G Series enthusiasts have been snatching these cars up for their reliable and easy to modify engines. One popular quick and easy modification is to convert your G37 to E85 with a flex fuel 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 plug and play eFlexPlus and eFlexPro are easy to install and can be done in an afternoon. Some of the benefits of our E85 conversion kits include an increase in horsepower by up to 12%, ability to set driving profiles from your phone to manage performance and fuel economy, and eFlexPro comes with eFlexTuner software, allowing you to tune your Infiniti G37.


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 & ModelInfiniti G37
Engine3.7l / VQ37VHR
Power328 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

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