1998 Forester What does this do?-see picture - What is this.jpg (0/2)

Jul 13, 2006 4 Replies

Hello everyone.



Attached is a picture of my air filter / intake system. Just after the air filter but attached to the plumbing is an enclosed cylinder type device. Does anyone know what it's function is and what is it called?



Thank you for any responses.



A.J.


Likely the MAF?

Carl

Are you talking about the empty canister that is attatched so that it points in the general direction of the firewall, on the the air intake just after the MAF? I had one of those on my 89 GL Turbo wagon and I have one that is curved but otherwise the same on my 93 Impreza. I have always wondered what it was and what it did myself, so if that's what your question is, I'm all ears too. (o; It seems entirely passive, just a plastic cylinder, but it must serve some purpose or I imagine Subaru would not spend their money and ours to engineer it into the air intake system.

~Brian

Hi Brian,

The answers I received is that it is a type of impulse resonator. This somehow give a more accurate picture to the MAF of what is going on in the manifold and also contributes to slightly more power.

BTW I was pointing to the tube like structure about 1.5 inches in diameter with a slight bend pointing toward the front of the car.

AJay

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