Yaris air filter lid

[metaltransam]

The secondary air filter stuck in the air filter lid looks pretty dirty, possibly a restriction, can you change these? Do people remove them completely? Really whats the point of it? I'm surprised I cannot find any threads on morons hacking the crap out of it without doing the proper research first, like in the honda forums, lol.

[Kaotic Lazagna]

Are you talking about the carbon trap? Those aren't replaceable, you'd have to buy a new top portion of the intake box.

[Bluevitz-rs]

it's an emission control item and shouldn't be removed.

[cali yaris]

^ Oh. Oops. :biggrin:

[Bluevitz-rs]

well, if your gonna leave'er stock HEHE

[malibuguy]

That was one of the first things i did to my yaris....just drill out the little dummy rivets and it comes right out...my xb had one too

[CrankyOldMan]

Wait, a carbon filter on the intake? Is it supposed to neutralize acidic air or something?

[Bluevitz-rs]

It's there to absorb fuel vapor that can leak out from the intake when the car is off.

[clarkemode]

I was wondering about this secondary filter as well and my 2006 Corolla had one. I removed it on the Corolla and that car seemed peppier (less air restriction). I did the same to my Yaris when I got it last year and I noticed it had the "extra" filter. Not throwing any trouble codes and I could always put it back in with some sealant. It is actually called a "screen" on the diagrams of the intake if you do a search for Toyota OEM parts.

[ilikerice]

lol, removed mine as soon as it got home from the dealer..

[cali yaris]

Here's an alternative viewpoint:
http://www.autospeed.com/A_111486/cms/article.html

[ilikerice]

you know.. its funny, cuz I just take my filter out also when I go to an event. After finding out I only got a +1.5whp gain out of my CAI, I took it off and just ran oem box. But for sh!ts and giggles, I take out my filter when I autocross or track.

[cali yaris]

1.5 whp may not sound like much, but it's almost a 2% gain. And mods help each other to give higher results per mod.

[ilikerice]

1.5 whp may not sound like much, but it's almost a 2% gain. And mods help each other to give higher results per mod.

agreed 100%.

Off-topic::offtopic:
I have no other supporting mods in that area at the time. Plan to turbo anyways so exhaust manifold and CAI are just items that i will be throwing my money away at.

[EPyarisdriver]

So if i take out the top filter and leave the drop in and take out the drop in when I race itll be a little peppier??

[ilikerice]

I can only go by assumption on this. I have yet to dyno with/without filter. I just did the CAI.. I do it only cuz I like to think it gives me a little pep.. But honestly, I cant give you a real answer on that.

[EPyarisdriver]

well I guess Ill have to just see for myself on this one.. brb haha :biggrin: