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iWire Speed Density Adapter (Subaru)
With just two connector clicks, you'll be ready to tune your car on Speed Density with iWire's plug-and-play harness!
What the Heck is Speed Density, and Why Did my Tuner Recommend it?
Speed density quite simply is another way to estimate how much air is getting into your engine. Your tuner likely recommended our Speed Density harness because you have a larger turbo or at least make more power than stock. Often this scenario creates a situation where the stock MAF (airflow sensor) is less accurate. Switching to Speed Density will help the tuner get a more precise calculation of how much air is getting into your engine. We have a great in-depth post on iWire University to explain Speed Density and how it works.
Why Do I Need this Wiring Kit Instead of the Pigtail Included With My Sensor?
To wire the sensor correctly, you need the wiring diagrams for your car year and model to determine the pinout. Our harness plugs in and takes care of this for you.
We seal the cavities for the unused connections in the plug to prevent corrosion. The open plug or exposed leftover wires can wick water into the main harness causing severe damage.
Unprotected wire without proper sleeving can melt on the block or wear a hole in the wire due to normal engine vibration. We wrap our harness in military-grade Raychem DR25 for superior heat and abrasion resistance.
If you cut and splice, it becomes difficult to revert to stock.
Compatible Cars
2002 - 2021 STi
2002 - 2014 WRX
2004 - 2014 Forester XT
2005 - 2012 Legacy GT
2005 - 2012 Outback XT
Fitment Notes
Length Differences
Front Mount Length = 48 inches
Top Mount Length = 36 inches
IAT Sensor
Our Speed Density Wiring Kit works with any 3/8" NPT IAT sensor. When adding on the IAT sensor from us we utilize the AEM Sensor with weld on bung AEM part number 30-2010.
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iWire Speed Density Adapter (Subaru)
iWire Subaru Wiring Services began in 2008 with just one man and an idea. Brian thought to himself, "How can I take my knowledge of car wiring, make it easier for other Subaru swappers, and also provide a friendly and transparent service which the automotive industry generally lacks." Since our humble beginnings we have grown in staff and size but our mission has remained the same; to provide a high quality product, great customer service, and reasonable turn-around times all with a straightforward and honest approach. With these core values in mind, we continue to develop relationships with each and every customer in order to provide insight and service that suits their needs. When we say to our customers "if there is anything you need, please ask," we mean it.
| Year Fitments | Subaru STI | Subaru WRX | Subaru Forester XT | Subaru Legacy GT | Subaru Outback XT |
|---|---|---|---|---|---|
| 2002 | ✓ | ||||
| 2003 | ✓ | ||||
| 2004 | ✓ | ✓ | ✓ | ||
| 2005 | ✓ | ✓ | ✓ | ✓ | ✓ |
| 2006 | ✓ | ✓ | ✓ | ✓ | ✓ |
| 2007 | ✓ | ✓ | ✓ | ✓ | ✓ |
| 2008 | ✓ | ✓ | ✓ | ✓ | ✓ |
| 2009 | ✓ | ✓ | ✓ | ✓ | ✓ |
| 2010 | ✓ | ✓ | ✓ | ✓ | ✓ |
| 2011 | ✓ | ✓ | ✓ | ✓ | ✓ |
| 2012 | ✓ | ✓ | ✓ | ✓ | ✓ |
| 2013 | ✓ | ✓ | ✓ | ||
| 2014 | ✓ | ✓ | ✓ | ||
| 2015 | ✓ | ||||
| 2016 | ✓ | ||||
| 2017 | ✓ | ||||
| 2018 | ✓ | ||||
| 2019 | ✓ | ||||
| 2020 | ✓ | ||||
| 2021 | ✓ |
WARNING: Operating, servicing and maintaining a passenger vehicle or off-road vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to P65Warnings
| SKU | iWire Speed Density Adapter (Subaru) |
|---|---|
| Brand | I-Wire |
| Product Type | Engine |
| Engine | Electronics and Sensors |