This iWire blog post breaks down some basic harness terminology. We hope these diagrams will make it clear exactly which harness is which and the harnesses needed to complete your merge. Subarus are a bit different from most cars. With most manufacturers the ECU to engine wiring harness is all...

When installing a different engine type (e.g., NA to turbo) into a Subaru chassis, the Engine Control Unit (ECU) also needs to be swapped in to get the engine running correctly. ECUs, with almost no exception, are not interchangeable if the model and year of the car do not match, so...

Looking to have iWire do a wiring harness merge for your project? Excellent! We're here to help but have a few steps before you send us any harnesses to ensure everything goes smoothly. We have created a specific page just for this. Please click the link below to get started!...

In this blog post we talk about the plugs that are most commonly mixed up or confusing for our merge customers. Below we have pictures of each with a short description to help clarify things. This is specifically for 98-01 Impreza models. Many other models have similar connectors so this...

  You asked so we delivered. Below is our Video Install Guide on how to install your Subaru wiring harness (wiring loom) in your Subaru. In the video we use a 2000 RS with a 2003 WRX Swap which is an example for 1998-2001 Imprezas, 1998-2001 Foresters, and 2002-2005 WRX...

Warning - No aftermarket standalone ECU will pass an emissions test because they do not have OBD2 communications that would be required. Update April 2022 with Cobb Green Speed With ripple effect of the Cobb Green Speed update we've gotten a lot of requests for standalone ECU harnesses. Unfortunately we...