Standalone ECU Projects

     We believe that the OEM Subaru ECU is the best choice for a majority of projects, however, there are situations when a standalone ECU is the appropriate option. Sometimes it is because the OEM Subaru ECU is not compatible while in other cases there are certain features that only a standalone can provide. 

     When iWire utilizes a standalone ECU we build the harness that comes from the ECU and goes to the main engine plugs from scratch (no donor harness that matches the new engine needed). From there we merge the harness we build into your stock harness to make it plug and play and have OEM fit & finish on a standalone ECU setup. All you have to do is install the harness and get your car tuned. 

How to Know if You Will Need a Stand Alone Ecu: 

6 Cylinder (H6) swaps

- CANBUS engine into Non CANBUS car (example: 2009 engine into 1993 chassis)

- Non tunable from factory cars (example: Old JDMs or Automatic Car ECUs)

- Non CANBUS engine into CANBUS car (example: 2002 WRX into 2010 Chassis)


If you aren't sure if your project will need an OEM or Stand Alone ECU - Contact Us!

Which Stand Alone ECU's Do We Support? 

  • Haltech

  • AEM

  • Emtron

  • Adaptronic

  • Motec

We use these brands because not only do they make quality products they have good customer support. We stake our reputation on every build we do so we only use reliable ECU's.

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

Contact Us! 

Harness Pricing

$3499.99 for Labor

plus the cost of ECU of your choice. 

We build the ECU to Engine section from scratch and merge it into the body harness you provide. We also provision leads so you can utilize all of the features of your Stand Alone ECU. 

Please keep in mind that more custom options can lead to higher pricing.

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

Before iWire

After iWire

iWIre Logo with Wording 2 - USE.jpg




Mon - Fri: 9am - 5pm PST


iWire is here to simplify your Subaru powered project, big or small. Focus on the mechanical aspects and we'll take care of the wiring headaches for you.

Lake Forest, CA





© 2020 by iWire. 

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iWire products are proudly Made in America. 

Haltech Elite Harness for VW Bug

Haltech Elite Harness for VW Bug