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Old 02-23-2002, 02:34 AM   #1
KillerRex
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Exclamation Injen CAI or AEM CAI?

I'm looking to buy a cold air intake for the REX. Does anyone know which intake works better? I saw the Injen one uses a larger diameter pipe with less bends, and the AEM used a longer, smaller diameter pipe with a few more bends.

I'm starting to lean more towards the Injen CAI. What do you guys think of each one? Thanks.
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Old 02-23-2002, 02:49 AM   #2
AK_2002_WRX
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do a search...this topic has been talked about too much!!
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Old 02-23-2002, 02:50 AM   #3
jer0
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From my knowledge, AEM makes the best. So go with there product. AEM has always made great products and they offer their intakes in assorted colors, while the injen one is that chrome and red look, where as i have a blue aem intake on my world rally blue car. Ive talked to people with the injen intake and its basically a pipe with a filter, so they all do the same job, i just tend to lean to the guys with a reputation ( aem ) than the guys competing. In the end they are all the same thing (CAI ) but aem would be my choice.
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Old 02-23-2002, 02:52 AM   #4
AK_2002_WRX
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Talking just kidding!!

sorry...did i sound like those other people?
if i were you i would go with the Injen. it is a one piece and may be easier to install than the 2 piece AEM. i think the injen one looks nicer too. basically they are both the same but people have different opinions, but i would go with the Injen one though, a little less pricey too.
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Old 02-23-2002, 02:55 AM   #5
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whoa... i responded before me...i didn't intend for our posts to sound similar both are good intakes though. but i have read that the stock intake isn't really a restriction, the main restriction in the intake system is the pipe that runs under the intake runner.
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Old 02-23-2002, 03:04 AM   #6
KapaFool
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I have seen both those intakes on cars before. And the owners of those said that they felt some difference over stock. You can also hear the intake sucking in the air when you accelerate. I don't have one and I see no reason to get one. In my opinion the Injen would be a better choice for the price. But AEM has different colors.
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Old 02-23-2002, 03:18 AM   #7
KillerRex
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I don't really care about the colors and all. I'm concerned with performance. Is there any advantage/disadvantage to the 2-piece design that AEM uses?
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Old 02-23-2002, 03:25 AM   #8
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i think it is a good design...but since the injen is only 1 piece it would be a little easier to install. if the first pipe in the AEM system was a little shorter, you can make it into a short ram if it is raining hard or something.
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Old 02-23-2002, 03:57 AM   #9
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I ran the AEM for a while. It is a nice product that seems to be well made. The instructions suck but hey, who needs instructions right? I chose the AEM over the injen because I liked the fact that the AEM was two piece. That and I liked the grey/silver powder coat that mine came in. I did notice a power gain and my Q mile times dropped. But.. I guess I am getting old and I dont want the noise. I have mine up for sale in the Classifieds if someone wants a good deal on a 2 month old AEM intake...


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Old 02-23-2002, 07:35 AM   #10
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The MRT CAI is the only one (that I know of) that has the same inside diameter air flow meter housing as the original plastic piece. Hence no CEL with this unit.....

All of the other brands have the AFM holder welded into thin wall 3in tube which would give an ID of about 73-74mm...the factory piece is 67-68mm...food for thought....
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Old 02-23-2002, 10:20 AM   #11
dman918
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There are no cel issues with the AEM or the Injen. I find that the Injen is a pain to install since it is the one piece design. It will get scratched to hell while putting it in. When you actually install it, the connection areas are shady and do not hold the intake in well at all. I just got the AEM, and though I have not installed it yet, it looks a lot better and comes with a lot more hardware to make a more solid installation.
Point: Go with the AEM.
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Old 02-23-2002, 02:40 PM   #12
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Quote:
Originally posted by OzWRX
The MRT CAI is the only one (that I know of) that has the same inside diameter air flow meter housing as the original plastic piece. Hence no CEL with this unit.....

All of the other brands have the AFM holder welded into thin wall 3in tube which would give an ID of about 73-74mm...the factory piece is 67-68mm...food for thought....

Guys. Just FYI. This guy does not know what he is talking about. For some reason he is making assumptions about the intakes that he does not own. Neither the Injen or AEM has the MAF in a 3 inch tube.

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Old 02-23-2002, 06:14 PM   #13
Kegger
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I was also leaning towards buying the Injen myself, but it looks like K & N has a new CAI to compete against the Injen and AEM. I saw it advertised for the WRX specifically in this month's SCC. Does anyone have any info on this....especially interested in dyno results.
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Old 02-23-2002, 06:50 PM   #14
jesse370
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The issue with any of these intakes is that it WILL cause you car to run lean with out proper tuning. Think about it, shiv flat out says not to use one. And the only US tuner that does include one is cobb.
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Old 02-23-2002, 07:43 PM   #15
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If you have the ability and the tuner to adjust the A/F ratio, then extensive testing has shown the APS/Cobb intake to be the most effective.

This is a dyno of the increase by simply bolting on the APS intake and remapping the A/F properly. Total cost was around Au$500. If US tuners other than Cobb don't like the idea then they must be living in a world with funky physics :-)

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Old 02-23-2002, 07:44 PM   #16
OzWRX
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AZScoobie

What is the OD of the tube on the Injen/AEM then?....if it matches up to the plastic turbo inlet piece (which it appears that it does), this has an OD of 75mm....If Im wrong, sorry.
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Old 02-23-2002, 07:50 PM   #17
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If you have the ability and the tuner to adjust the A/F ratio, then extensive testing has shown the APS/Cobb intake to be the most effective.

This is a dyno of the increase by simply bolting on the APS intake and remapping the A/F properly. Total cost was around Au$500. If US tuners other than Cobb don't like the idea then they must be living in a world with funky physics :-)

SKC
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Old 02-24-2002, 12:18 AM   #18
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Quote:
Originally posted by OzWRX
AZScoobie

What is the OD of the tube on the Injen/AEM then?....if it matches up to the plastic turbo inlet piece (which it appears that it does), this has an OD of 75mm....If Im wrong, sorry.
They use 2.75 inch tubing so by the time you get to the inside diameter both are very close to the stock size. If they where not the MAF Sensor would not read even close. I had a chance to measure the AEM, INjen and the stock housing.


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