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Old 11-06-2010, 07:17 PM   #1
nomas81
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Default Im looking for some help with picking the proper Cold Air Intake

which cold air intake do people recommend for a 2010 impreza 2.5i wagon?

I've been looking at:

AEM
K&N
and Perrin.

I'm not sure which one would fit. If anyone has a descent cold air intake on their impreza 2.5i please let me know.

Thanks.
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Last edited by nomas81; 11-07-2010 at 12:37 PM.
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Old 11-07-2010, 01:59 PM   #2
424wrx
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Old 11-07-2010, 03:29 PM   #3
SUBIESROCKUKNOW
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i got a cosmo racing CAI on my 08 2.5i i just painted it blue 2day..
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Old 11-07-2010, 10:08 PM   #4
Ogden
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Quote:
Originally Posted by nomas81 View Post
which cold air intake do people recommend for a 2010 impreza 2.5i wagon?

I've been looking at:

AEM
K&N
and Perrin.

I'm not sure which one would fit. If anyone has a descent cold air intake on their impreza 2.5i please let me know.

Thanks.
Do yourself a favor and read the CAI/SRI sticky in the Naturally Aspirated forum. CAIs and SRIs let in way too much air for the car and tend to make you run lean. The ECU cannot adjust the air/fuel mix sufficiently and you end up with too much air in the mix. Think about getting a tune to help deal with the extra air if you really want an intake.

The stock intake is already very efficient, and it's also a CAI already. It takes air from the leading edge of the hood. Save you money and go with a decent panel filter. I use the AVO one.

Last edited by Ogden; 11-07-2010 at 10:13 PM.
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Old 11-08-2010, 10:39 AM   #5
08imprezahatch
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Default stock intake

I could be wrong, but I have heard many times that the stock Subaru intake is very restrictive. Its just with the MAF sensor that readings are thrown off and your car will run super rich below 1000 rpms because the ECU is massively over-estimating the amount of air entering your car.

I was under the impression that with a tune a SRI or CAI could net some decent power gains at higher rpm's (and maybe a loss at lower rpm's).

Thoughts?
And I've heard that the cosmo CAI fits but rubs uncomfortably close to some things. The AVO intake seems like a good bet to me.
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Old 11-08-2010, 01:49 PM   #6
Ogden
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I'm nto sure that anyone with an AVO has posted their impressions yet. One member with a Cosmo got his car tuned and discovered that he is running lean. Too much air for the ECU to adjust for.

Read the sticky at the top of the N/A sub-forum. For the 08+ cars, the intake is pretty efficient and sized well for the car (and draws cold air from outside the engine compartment). The only real losses seem to be from the corrugated part of the tubing, which is why folks have come up with a "hybrid" intake that keeps most of the stock intake, but replaces that corrugated section with metal tubing.

You may get power gains (and possibly low-end losses) but, IIRC, the problem is that it lets in too much air for the stock tune to handle. If you want an intake, I would get the intake, get the exhaust you want, put them on the car, and then have it tuned.
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Old 11-08-2010, 09:32 PM   #7
nomas81
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Default thanks

thanks for the thoughts.....ideas....and comments.

Last edited by nomas81; 11-08-2010 at 09:49 PM.
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Old 11-09-2010, 01:27 AM   #8
nairbmik
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Intakes are an absolute waste of money if you're not going to get a tune to go along with it.

Why? Simply put, without a tune the car runs like absolute crap. You'll gain very very small HP numbers, and for the cost of $125+, it's just not worth it.
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Old 11-10-2010, 01:00 PM   #9
thegonz
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i got the cosmo racing intake
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Old 10-07-2011, 11:17 AM   #10
kaja
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Default Cold Air Intakes

So, it is recommended that if you are planning to add a cold air intake, you should also plan on changing your tuning? Will you see a benefit without changing your tuning? Do you need to upgrade your exhaust as well?

I have a 2011 STI. If I changed to a CAI, what can I expect in terms of additional power? What happens to your mileage?
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Old 10-07-2011, 01:28 PM   #11
Ogden
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OBP over DGM

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Kaja,

I'd ask that over in the engine/exhaust forums. This thead was started with a question about an intake on a non-turbo Impreza. Very different animal than your STI with very different schools of thoughts on intakes and exhausts.

You will eventually get the answers you want here, but you will get them faster in the other forums where I'm sure that your question has been answered already for the 08-10 STIs which will continue to apply to the '11 models. Good luck!

Last edited by Ogden; 10-10-2011 at 10:37 PM.
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Old 10-10-2011, 03:17 PM   #12
kaja
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Will do, thanks.
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Old 10-10-2011, 07:56 PM   #13
RedDragon08
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I'd go with the K&N
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