How to put a turbo EJ 2.5 Liter engine into your 2.0 WRX

Flatirons Tuning Tech Tip - Putting a 2.5 Liter engine into your 2.0 WRX

Almost as soon as the EJ257 came out, people figured out that you could put that engine into a 2.0 WRX, and keep the 2.0 heads, and the Hybrid Swap was born. After a while, the question came up of whether you could just swap a full 2.5 liter EJ255 or EJ257 into a 2.0 WRX, and that is where things got complicated.

Long story short, AVCS really got in the way, and slowed down the progression of this swap. And now that there are a number of good solutions to correct the issues you can run into with a Hybrid Swap, putting in a full 2.5 liter engine doesn't get discussed much anymore.

However, there are some folks out there, us included, that have been working on this swap. A couple of years ago, we were able to get everything simplified to the point where we were not only able to get it to work, but we were able to make it pretty straight forward. We have helped some people do this since then, but we get a lot of questions about it, and there is still a lot of confusion surrounding our method, so we decided to put this video together as a reference.

So hopefully this helps to clear things up, and maybe we'll start to see more and more full 2.5 liter Bug-Eye's out there!

If you want to:

Put an STI 2.5 Liter Engine into your 2.0 WRX

Put an EJ257 or EJ255 Longblock into your 2.0 WRX

This video should help!

If you are looking for either the Cam Angle Sensor or Cam Sensor Plugs that we mention in the video, here are links to those on our web-site:

Torque Solutions Cam Angle Sensor Bracket

IAG Cam Sensor Delete Plug