Why two air filters?

[Johnny (archive)]

Hi, this is my first subaru(Impreza 1999) and there is two air filters. Why all this restriction? Is it really necessary? Can i take out one of them?

Jean

 

[Edward Hayes]

What two filters??

 

[X-Eliminator]

Do yo have a California car ?

 

[Johnny (archive)]

Impreza sold in the area of Montreal QC Canada.

Do yo have a California car ?

 

[rick (archive)]

Is there actually a filter in each box? I thought one of them (probably the forward-most) is supposed to be empty.

Rick

 

[Johnny (archive)]

No filters on each.

Is there actually a filter in each box? I thought one of them (probably the forward-most) is supposed to be empty.

Rick

 

[Philippe Javaux]

In the 2.2l 1999 Impreza in Canada it should have one air filter in the first airbox. The second air box is empty.

 

[Johnny (archive)]

Second box = beside the throttle body?

In the 2.2l 1999 Impreza in Canada it should have one air filter in the first airbox. The second air box is empty.

 

[X-Eliminator]

Yeah - the one attached to the throttle body has NO filter inside. But if it's a California car, it's reversed, the other one is empty.

 

[99Red_Forester]

Mine have 2 air filters. for real. 99Forester L (Canadian)

1 really big filter by the firewall/throttle body.
1 smaller filter (regular rectangular sized) by the passenger side fender.

Interesting. So, in most cases, you guys/gals have 1 empty box?? How 'bout Subarus in Oz?

A little off topic here...
with reduced Air Flow restriction, do you get better high end power OR does it improve all around driving? What does it do to gas mileage? I'm thinking of removing 1 filter.

Leo inToronto

 

[Shane Brittle]

Aussie Imprezas (non turbo) have one air filter, next to the throttle body.

Cheers

Shane
Canberra

 

[99Red_Forester]

Thanks for the reply. OK. I'm removing the smaller filter.

Leo