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2007-2008 Nissan 350Z E85 Flex Fuel Conversion Kits

Boost Your V6 Engine’s HP by Up To 12% with eFlexFuel

The 350Z was produced from 2003 to 2009 and was a very popular model for Nissan because of its stock capabilities. Out of the box, this naturally aspirated 3.5L V6 was capable of 308 horsepower with zero tuning or upgrades. Mix this performance with its sleek looks and factory handling abilities you had an impressive road-ready sports car straight off the assembly line. If you want a quick and easy way to boost this car’s explosive performance, then ethanol is the way to go. With our easy-to-install E85 flex fuel conversion kits for the 350Z, you can upgrade your car in an afternoon by yourself and have plenty of time to cruise with up to 40 more ponies the same day.

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


eFlexFuel produces E85 flex fuel conversion kits for the 350Z that can increase horsepower by up to 12%. That’s up to a 10% increase with the eFlexPlus and 12% on the eFlexPro. You also get a high-tech phone app that allows you to monitor your fuel mix and switch driving profiles between performance and economy. If engine tuning is your thing, the eFlexPro comes with eFlexTuner software that allows you to tune your 350Z with a fuel mix of E50 or higher.

But what if you are driving and can’t find a gas station that has E85? No worries! Our flex fuel conversion kits allow you to run ANY mixture of E85 flex fuel and standard gasoline without changing settings. Order your DIY E85 conversion kit today and experience the benefits of flex fuel.


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 & ModelNissan 350Z
Engine3.5l / VQ35HR
Power308 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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