FLX01 - Upgrade Kit (3 Pin and 5 Pin Harnesses)
SKU: 57416169343

FLX01 - Upgrade Kit (3 Pin and 5 Pin Harnesses)

Sale price$172.77 Regular price$191.97
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Ships within 48 hours · Estimated delivery Jul 4 - Jul 9

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Description

FLX01 - Upgrade Kit (3 Pin and 5 Pin Harnesses)This kit is designed to provide a way to data log and monitor the ethanol content of fuel on most new Subaru Vehicles. Our proprietary controller reduces complications by generating its own on board 12V supply to power the sensor. This reduces wiring, installation time and improves reliability. Our system also properly references the ECU 5V power to provide the most consistent and accurate data. We have supplied hose assemblies for both the 2008+ STi

This kit is designed to provide a way to data log and monitor the ethanol content of fuel on most new Subaru Vehicles. Our proprietary controller reduces complications by generating its own on board 12V supply to power the sensor. This reduces wiring, installation time and improves reliability. Our system also properly references the ECU 5V power to provide the most consistent and accurate data. We have supplied hose assemblies for both the 2008+ STi and WRX in a single kit to reduce complication and confusion when ordering. The kit also comes with a custom wiring harness that can be detached from the controller to make any troubleshooting and repairs simple and painless.

Since the cars only have two TGV plugs capable of receiving inputs you cannot run our Secondary Injection Controller, Flex Fuel Sensor and Fuel Pressure Sensor kits all at the same time. You can only run a maximum of two of these three items. The SIC can be wired as power only in order to utilize all three but a custom harness must be made.

Compatibility:

3 Pin Version

2002-2005 WRX
2004-2006 STi
2004-2008 Forester XT
2005-2006 Legacy GT
2005-2006 Outback XT

5 Pin Version

2007-2021 STi
2008-2014 WRX
2007-2012 Legacy GT
2007-2009 Outback XT
2009-20013 Forester XT



Works with all fuel management systems but the car must be tuned specifically to run flex fuel. This kit has the same voltage output of other popular kits. Retuning your car most likely will not be required if you are just replacing another brand of flex fuel controller.

Key Benefits:

  • Replaceable wiring harness that will be sold separately

  • Automotive grade wiring

  • No need for 12v supply from rear O2 sensor (common failure point)

  • Installation can be done from the top with no need to crawl under the car

  • Properly referenced analog output from ECU 5V for better accuracy

  • Potted housing with solid pin connector for the ultimate in durability

Included in the kit:
Flex Fuel Sensor Controller
Wiring Harness (3 Pin or 5 Pin)

This product will not ship to California. It is not CARB approved. We do not feel that this product alters or changes the emissions systems on the car but due to the California regulations we cannot currently ship to that state.

DO NOT MOUNT CONTROLLER DIRECTLY ON INTAKE MANIFOLD. READ INSTRUCTIONS IN LINK BELOW.

Installation Instructions

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 57416169343

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Better running mower
Seems to work fine and runs great
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Grantham, US
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Perfect Spark Plug
Perfect match for my lawnmower. Worked as soon as I placed it on. Great product. Thank you Amazon for the product. Fast, correct product, and affordable
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Bluegrass Picker
Massapequa, US
★★★★★ 5
Cost-effective alternative that works well..
I used these spark plugs on my 2018 Cub Cadet XT2 riding mower as part of the spring preparation. The spark plugs were well packed and arrive in great shape and at the appropriate gap. No issues with starting or operating the mower. These Harbot plugs turned out to be a great cost-effective option for me.
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shayna20
Fort Morgan, US
★★★★★ 5
They work great.
The spark plugs are an exact replacement for my riding mower.
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Reviewed in the United States on May 10, 2026
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Amazon Customer
Charlottesville, US
★★★★★ 5
Good spark
Plugs work well. Mower seams smoother
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Reviewed in the United States on April 30, 2026

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