Merge Services - 6 Cylinder



As of December 1st, we will only be taking on 25 more harness merges before we no longer offer this service. 

Thank you for your interest in our wiring services! Our custom harness merges combine the power and features of your new engine and ECU with the factory amenities of your chassis. We strive to make a high-quality and reliable harness so you can enjoy driving the car and not worry about electrical gremlins. 

Please Click Here to Find Out How to Reserve Your Spot

Please Read the Open Letter to Our Merge Customers

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Key Requirements for the Chassis

Chassis is one of the following
1993-2001 Impreza/OBS
1995-2004 Legacy
1995-2004 Outback
1998-2002 Forester

Chassis must be left-hand-drive
Dash is original to the chassis
The post-swap transmission needs to be a manual
We will do auto-to-manual conversions with the engine swap wiring

    Key requirements for the Engine

    Engine must be from an OBD2 model and NON-CANbus. They are the following

    2001-2006 JDM STi (using non immobilized ECU from 2001-2004)
    2001-2006 JDM WRX (using non immobilized ECU from 2001-2004)
    2002-2007 WRX
    2004-2007 STi
    2004-2008 Forester XT
    2004-2006 Baja XT


    Engine MUST be the same year or newer than the chassis
    Due to increased EPA enforcement, we no longer wire up an engine that is older than the chassis it is being installed in.

    Please Click Here to Find Out How to Reserve Your Spot

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    Unfortunately, this is not an engine platform we can support for merges.

    iWire is no longer building harnesses for six-cylinder swaps because they require a standalone ECU. Due to the updated EPA restrictions, we have decided to focus on stock ECU applications that can be made legal. Although some people have made it work with the stock 6-cylinder ECU, several issues exist with this route. We are currently unable to solve these issues, which leaves us unable to deliver a harness up to iWire standards.

    For more information on 6 Cylinder applications, click here.

    While we can't do the full wiring harness for you, we have many connectors and wiring kits that will work with your project. Check out our website to find what you need!