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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!


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
Power313 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 10% Increase in Performance
Flex Fuel System VerifiedYour Fuel System Verified

DIY 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

More eFlexApp Features

Please confirm device versions features at eFlexApp page

eFlexTuner Main Features

More eFlexTuner Features

Please confirm device versions features at eFlexTuner page

+ Compare products

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
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)13
eFlexPro view for analog data
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



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.

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

Want $50 off your eFlex kit?

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