Installation Tech Documents
If you have any issues or questions while installing our products, please call or email us BEFORE touching any of the wires including cutting and splicing. Usually harness alignment is off due to installation error and not manufacturing error. If we did make an error, we are always happy to make it right so please call us with any questions! Check out the iWire Waranty to see if your product is covered.
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Don't see the answer you need below? Check out the iWire Blog.
Merge Help Docs
V1-2 Swap Help Document
V3-4 Swap Help Document
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V5-6 Swap Help Document
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USDM 02-05 WRX Help Document
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USDM 04-06 STi Help Document
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USDM 07 WRX and STi Help Document
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iWire Subaru Wiring Harness Install Video
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Fuel Pump Controller Install Guide​
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Commonly Confused Plugs
818 Help Docs
Product Help Docs
AVCS Install Guide
Note: We do not post our AVCS Install Guide online. The link to the instructions are included in each kit. If you lost your instructions, please email us at
