This video will show you how to install the IAG Air Oil Separator (AOS) on the 2015-2021 Subaru WRX. This was done on a 2018 but the 2015 and 2016 years require the ECU to be relocated. IAG AOS was purchased from www.Subimids.com and listed below is a link to it.
IAG Air Oil Separator: https://subimods.com/products/iag-per...