u/Aggravating_Cut537

▲ 2 r/wrx_vb

To AOS or not AOS

I’ll be getting an ETS intake installed within the next couple weeks and a tune to go with it. I keep seeing mixed opinions on AOS, on one hand I’m seeing people who say it’s a must. On the other people who say AOS just recirculates contaminated oil. Anyone have good or bad experiences getting tuned with out one? Bad experiences with one causing engine damage?

I’ve considered going dual catch cans instead but I’m in the Midwest and my understanding is that there can be issues with freezing in low temperatures, any input would be greatly appreciated.

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u/Aggravating_Cut537 — 5 days ago