Learn what an air oil separator is as I unbox this IAG Street Series Air Oil Separator in preparation for my installation in my 2020 STI. I go over the theory of how it works, what all the hoses do, how it compares to a catch can, and why it might be necessary in your car.

For a COMPLETE step-by-step installation of this AOS check out my tutorial here:    • How to install an Air Oil Separator (...  

This is the IAG AOS you see me unboxing:

For the STI →→ https://amzn.to/2T3qZwZ
For the WRX →→ https://amzn.to/2Wtc9lJ

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#STI #AOS #WRX