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Old 07-12-2008, 04:58 PM   #1 (permalink)
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Arrow Airbox Question

Hey guys, can someone tell me why there are 2 filters in the airbox? What is the upper one there for? Can i remove it with out any negative effects?
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Old 07-12-2008, 06:48 PM   #2 (permalink)
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There is only one filter in the OEM airbox.

The 2nd one you speak of is sort of like a plastic diffuser meant to smooth out the incoming air right before the intake air hits the MAF & IAT sensors.

When you install a SRI or CAI this diffuser is removed along with the entire OEM airbox.

It is not needed on aftermarket intakes but it is necessary with the OEM air box.

If you remove the diffuser - it may (some have already had tried this) throw a CEL.
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Old 07-12-2008, 08:22 PM   #3 (permalink)
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Arrow

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Originally Posted by XR2003 View Post
There is only one filter in the OEM airbox.

The 2nd one you speak of is sort of like a plastic diffuser meant to smooth out the incoming air right before the intake air hits the MAF & IAT sensors.

When you install a SRI or CAI this diffuser is removed along with the entire OEM airbox.

It is not needed on aftermarket intakes but it is necessary with the OEM air box.

If you remove the diffuser - it may (some have already had tried this) throw a CEL.
The one im talking about doesnt look plastic, it sits right above the stock filter, and its has some sore of white crap in it to. I think the one your refering to is the plastic honeycomb in the very top of the filter box i know thats for straighting the airflow. The white one looks like its set in place with plastic rivets. I'm just curious, i already removed the long intake tubing after the airbox. I just wondered if this restriction can be removed safely to.
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Old 07-13-2008, 03:53 PM   #4 (permalink)
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can you get pics of what you are talking about and post them up here? people can probably help more with pictures.
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Old 07-19-2008, 03:12 PM   #5 (permalink)
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Quote:
Originally Posted by Smar969905 View Post
can you get pics of what you are talking about and post them up here? people can probably help more with pictures.

Ok,i have the picture, will mistamatix have to post them for me again?

Last edited by KissMyBlackXR; 07-19-2008 at 10:58 PM.
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Old 07-20-2008, 01:33 AM   #6 (permalink)
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Originally Posted by KissMyBlackXR View Post
Ok,i have the picture, will mistamatix have to post them for me again?
you can use photobucket, imageshack, flickr, picasa, etc to host your images.

just upload your pics (these sites are free) and copy the image tags/links and paste it onto the message board thread of your choice.
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Old 07-20-2008, 02:47 AM   #7 (permalink)
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Quote:
Originally Posted by XR2003 View Post
you can use photobucket, imageshack, flickr, picasa, etc to host your images.

just upload your pics (these sites are free) and copy the image tags/links and paste it onto the message board thread of your choice.

Hey thanks, Here's the pic http://www.flickr.com/photos/28775726@N06/?saved=1
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Old 07-22-2008, 12:23 AM   #8 (permalink)
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^whoa....

I have never seen that before.

What year is your matrix? 2005?

maybe toyota added that AFTER the 03/04 models.. .
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Old 07-22-2008, 01:01 AM   #9 (permalink)
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^whoa....

I have never seen that before.

What year is your matrix? 2005?

maybe toyota added that AFTER the 03/04 models.. .

Yeah its like a second filter and yes its an 05 ... Im seriously thinking about getting it outta there. Maybe thats part of why my mpg isnt at the sticker. I baby this thing and get 25 city when the sticker claims 28. Anyone else care to chime in?
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Old 07-22-2008, 02:33 PM   #10 (permalink)
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i removed mine yesterday....when i installed my k&n filter....i reset my computer and took it for a drive and the throttle response was a lot better ..no cel for me...
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Old 07-22-2008, 03:05 PM   #11 (permalink)
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i removed mine yesterday....when i installed my k&n filter....i reset my computer and took it for a drive and the throttle response was a lot better ..no cel for me...

Did you have that second white screen in the upper lid??
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Old 07-25-2008, 02:15 AM   #12 (permalink)
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Does anyone else have this second filter.....? I removed mine the other day and wow i cant believe how restrictive that little thing is. Hope i see a difference in mileage..
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Old 07-27-2008, 04:41 PM   #13 (permalink)
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Quote:
Originally Posted by KissMyBlackXR View Post
Does anyone else have this second filter.....? I removed mine the other day and wow i cant believe how restrictive that little thing is. Hope i see a difference in mileage..
I have it on my 05 XR. After reading this thread, I looked at mine, and yes it is there. Mine is clean and i did not notice it when I replaced my stock filter with k&N. It looks like it is held by 6 screws, but it seems kind hard to take out without being able to turn it upside down. How did you take yours out?
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Old 07-27-2008, 08:55 PM   #14 (permalink)
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Lightbulb

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Originally Posted by kakarat View Post
I have it on my 05 XR. After reading this thread, I looked at mine, and yes it is there. Mine is clean and i did not notice it when I replaced my stock filter with k&N. It looks like it is held by 6 screws, but it seems kind hard to take out without being able to turn it upside down. How did you take yours out?

If you disconnect it from the intake tubing you can turn it over. Its held in with plactic rivets so the only way to get it out is to break the rivets. I took a flathead screwdriver and popped the rivets. If you do take it out try blowing air through it, not much goes through...
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Old 07-27-2008, 09:14 PM   #15 (permalink)
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Quote:
Originally Posted by KissMyBlackXR View Post
If you disconnect it from the intake tubing you can turn it over. Its held in with plactic rivets so the only way to get it out is to break the rivets. I took a flathead screwdriver and popped the rivets. If you do take it out try blowing air through it, not much goes through...

Any body knows why this thing is there, and what is its purpose. Moreover, why it does not exist on 03-04 models?
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