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.
The eFlexPlus E85 flex fuel kit automatically adjusts fueling, whether you have E85, gasoline, or a mixture of the two in your tank. eFlexPlus is the easiest way to properly convert your vehicle to a true flex fuel, E85-and-gasoline capable vehicle. Looking for greater ethanol fueling capabilities? Check out our patented eFlexPro system via the drop-down to learn more.
If YES, we strongly recommend our eFlexPro system. Your aftermarket wideband can be connected directly into the eFlexPro harness to fine-tune fueling and dial in ethanol AFR’s with our free eFlexTuner Windows software. Select the eFlexPro drop-down to learn more.
Vehicles with upgraded injectors and/or big power adders (aftermarket forced induction, cams, etc.) are recommended to go with our eflexpro kit for detailed fine-tuning and fueling capabilities.
Starting at $61.50 / month with 
SKU: U-EF-PLUS 
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.
| Make & Model | Nissan 350Z |
| Years | 2007-2009 |
| Engine | 3.5l / VQ35HR |
| Power | 313 hp |
Peak power gains do not always tell the whole story! It's important to look at power gains across the entire RPM range / dyno curve, A.K.A. power "under the curve." Power gains under the curve will have a greater impact on driving experience. This is because gains under the curve impact the broader usable powerband, whereas peak power is momentary - only at one point in the RPM range.
If peak gains are 5% while max gains under the curve show 20%, this +20% increase is a better reflection of how your driving experience will change (you'll certainly feel that increase!). You want to feel the difference in the seat of your pants, and this is where power under the curve plays usually the biggest role.
We confirm full compatibility with eFlexFuel systems and E85 for all kits that we offer. If your vehicle is approved and a kit is available, this means the injectors, fuel pump and fuel lines will be compatible with E85 once an eFlexFuel kit is installed. With over 65,000 eFlexFuel customers worldwide, we pride ourselves on our E85 and flex-fuel expertise.
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.
VelvetTouch+ is the first-class signal processing technology developed by eFlexFuel. This technology ensures that the eFlexFuel system works in any engine, environment and conditions without interfering in any way with the operation of the vehicle. It also ensures that there is no signal interference that could disrupt vehicle systems. VelvetTouch+ allows you to convert your vehicle to E85 in complete safety. Whether you drive on ethanol or gasoline.
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.
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. 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
with Key Information
Dyno Proven Power Gain
for Sensor Inputs
with Real-Time Parameters
Please confirm device versions features at eFlexApp page
With eFlexFuel's Pro models, fuel maps can be observed in the 3D graphics window. The view can be rotated freely and selected fuel map cells are highlighted over the 3D map. The color-coded fuel map makes analysis simple.
All running parameters of the control unit can be captured and saved to a log file. Choose which parameters to display including date range. eFlexPro and eFlexMoto Pro log files can be analyzed in-depth with the eFlexTuner. Color-coding helps distinguish data points. (For example, the fuel mixture or the injector duty cycle.)
eFlexPro and eFlexMoto Pro log files can be analyzed in depth with the eFlexTuner. Data can be taken from an entire session or a specific timespan. The data is color-coded, which helps to distinguish e.g., the fuel mixture or the injector duty cycle.
Please confirm device versions features at eFlexTuner page
 |  | |
|---|---|---|
| Features | ||
| VelvetTouch+ 1 | ||
| Free 5-Year Warranty (with registration) | ||
| Ethanol Content real-time measured over 100 times per second | ||
| Shock-Proof & Weather Proof casing (IP68) | ||
| Ethanol Tested & Approved fuel accessories (line, clamps, quick-connectors) | ||
| Bluetooth | ||
| 2 x Analog Wires (0-5V) for External Sensors | ||
| eFlexApp | ||
| Ethanol content | ||
| Vehicle speed | ||
| Engine RPM | ||
| Duty cycle | ||
| Fuel temperature | ||
| Ambient engine temperature | ||
| Injector activity | ||
| Cold enrichment status | ||
| Device status | ||
| Driving mode selection 2 3 4 | ||
| Cold enrichment mode selection 2 3 4 | ||
| Cold enrichment custom setting (created with eFlexTuner) 2 3 4 | ||
| Save RPM based enrichment with driving mode selection (created with eFlexTuner) 2 3 4 | 1 | 3 |
| eFlexPro view for analog data | ||
| eFlexTuner | ||
| RPM based 2D fuel map 3 4 | ||
| Fault codes 3 | ||
| Cold start adjustment 3 4 | ||
| Data logging 3 | ||
| OBD2 connectibity 5 6 | ||
| Autotuner 2 3 4 6 | ||
| 3D fuel map | ||
| 2D map for external sensor | ||
| Log analyzer (4D scatter plot) | ||
| Sensor editor for user-defined sensors | ||
| Presets for most common AFR gauges | ||
| Virtual Load Sensor Tuning (eFlexPro 2) |
1 VelvetTouch+ is the first-class signal processing technology developed by eFlexFuel. This technology ensures that the eFlexFuel system works in any engine, environment and conditions without interfering in any way with the operation of the vehicle. It also ensures that there is no signal interference that could disrupt vehicle systems. VelvetTouch+ allows you to convert your vehicle to E85 in complete safety. Whether you drive on ethanol or gasoline.
2 Does not include in eFlexPlus Direct.
3 Does not include in eFlexV10+.
4 Does not include in eFlexPlus Sensor.
5 Supports most Bluetooth OBD2 adapters (ELM327-protocol), for example OBDLink LX / MX+.
6 Requires Bluetooth OBD2 adapter for closed loop tuning and Wideband AFR gauge for open loop.
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.
Not legal for sale or use on pollution-controlled vehiclesAt the moment, we are experiencing a high volume of orders. As a result, order processing times are currently 3-5 working days. We respond to support messages as quickly as possible. We apologise for the delay and thank you for your understanding.
Our support site answers many common questions, so we recommend checking it before contacting us.
