How does an AOS work?

WE'RE BACK! Ever wonder why you need an AOS and how it works? That's exactly what we're talking about in this week's Two Minute Tuesday!

WRX

STI

[mysteriousguy]

About time someone mentions the difference from both. Knowing AOS you don't have to clean out (to often maybe!?) Seems I'll be going that route now, Thanks Kevin for the info!

[charliemagnegutierrez]

This very helpful and lot of things learned on this video just got an aos today

[Ejpastor]

Maybe a checklist for top 5 to buy for any turbo cars especially for wrx or sti

[geza]

That’s learned knowledge. Well done. Thanks. Got to watch a few times to fully understand

[rawrss]

How big of an issue is this for a stock WRX 2015+? Should a WRX being driven as a daily driver (no tracking) be as worried? Thanks SubiSpeed!

[andyzimmy]

Could we get a video of like a check list of things you should do when you buy a sti

[Flat]

So wait, if the catch cans get both oil and coolant mixed making that frothy death...how does an aos prevent that mix? you cant be dumping that back into the engine!?

[dominikcochrane]

What strut tower braces work with the AOS? I bought a Perrin one off your website a few months ago and it won’t clear the AOS. Just wanna find out that will and is of quality.

[benmorris]

I wish there were more AOS options for the NA Subaru engines like the FB20D in 17+ Impreza. I have a 2019 Impreza and the one reliability mod I want to do is adding an AOS to my car, as where I live is to cold for an oil catch can to work affectively come Winter time

[thadragon]

I have the Perrin front strut tower. So this IAG AOS will not fit with the Perrin?

[obZidianZ]

Right.. but which version to go with: street or competition? Car is a streetcar, driven hard, stage 1+ plus for now

[moisesr]

That air rerouted back into the intake track is not clean air.
That oil dumped back into the engine is not a good oil, it's deluted, broken down and could well have Carbon build up.
You do not wanna dumped none of that back into your engine, that's why oil catch can is better.

[ezwa]

☝️wats it go with the gas vapors & pressure thats routes back to engine with catch can?

[bolarobric]

Just bought a used 2017 STI with 79K on it. I know I really need this so I am trying to decide which AOS should I purchase for my street STI, would it be the Grimmspeed (affordable) or the IAG.

[j-morecoffeepls]

I have a 2017 WRX with 90k miles. Bone stock. Should I need this?

[ashed]

Would this help a problem with oil consumption on a 2017 wrx?

[santoscarrillo]

Looking into Perrin or IAG for the AoS anyone thoughts? I have a 2021 wrx base just about 30k miles stock so I figure its time to start more mods first one was the all powerful Cobb Sunshade 😊

[jonathanmiclat]

What do you mean by engine knocking?
Fine or Feed back knocking?

[Grc]

I was thinking of getting the Cobb one for my 2020 wrx would that one be fine ?

[ARA]

I bought a crawford AOS. Is the IAG one a superior AOS?