Subaru Harness Merging

"Subaru made it bolt right up, iWire makes it plug right in."

You'll send us the body wiring harnesses from your car and the car that matches the engine you plan to use. We'll send you back a custom plug and play harness that keeps the amenities of your car while adding features from your new engine and matching factory ECU. 

Harness Pictures and Reviews

Loo on Table_edited
Loo on Table_edited

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customer review - harness
customer review - harness

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03 Forester to 2.0 WRX
03 Forester to 2.0 WRX

Build #804

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Loo on Table_edited
Loo on Table_edited

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Have a question about your build? Looking for custom work? Want to know more about pricing for your project?

Contact Us! 

Harness Merge Pricing

Our pricing is based on putting the below engines into the following chassis:

93-07 Impreza, 95-04 Legacy, 98-07 Forester, or 02-06 Baja

Merge Pricing - $849.99

Engines We Wire:

1999+ JDM/EDM V5 and Up

2002-2007 USDM WRX

2004-2007 USDM STi

2004-2008 Forester XT

6 Cylinder Swap - Click Here

2008+ Engines - Contact Us for Price


- 2008+ Engines use CANbus - click here to learn more.

- $100 additional for RHD to RHD swaps

- $100 additional for swaps with an OBD2 engine in an OBD1 chassis

- $100 additional for merges into 2002+ chassis

Turn Around Time

Standard turnaround time is subject to change based on the volume of rush fees, but 4-6 weeks can be expected for non rushed orders. Please let us know your project time frame and we will do our best to work with you.

Rush Fee - $200 (About 1 week turnaround)

All of our Harnesses are Quality Checked before being shipped and are covered by our Lifetime Warranty. Click here for full warranty


Wiring Options

  • Add in AVCS Bulkhead Wiring - $200 (Only for USDM 2.0 WRX harness, running 2001+ JDM STi) Price Includes iWire AVCS Wiring Kit and labor to install.

  • Cruise Control for DBW Cars - $200 Non DBW cars will reuse factory setup (cable-throttle vehicles include cruise control by default)

  • Auto to Manual (As part of a merge) - $200

  • Cluster swap - $200

Recommended Accessories

  • Cobb Accessport - $650

    • Inquire about package deals 

    • Other COBB products we carry include boost controller, downpipe, heatshield, SF intake, SF intake with airbox, and uppipe. Visit our online store for product details and price.


  • DCCD via a DCCDPro

    • DCCDPro Manual Controller - $368.99

    • DCCDPro Spiider Auto/Manual Controller No Cluster - $599.99

    • DCCDPro Spiider Auto/Manual Controller With Cluster - $699.99

    • DCCD Roller Switch ($99) and Auto/Manual Button ($59) - $140 for the pair

    • Vehicle Speed Sensor Extension Harness -       $34.99