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Old 01-18-2013, 09:26 AM   #26
nystateofmind308
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Love mine
As do I! Im running stage 1 w/ 93octane and holy ****! It moves!
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Old 01-19-2013, 10:12 AM   #27
Elky
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Originally Posted by yudangorgor View Post
unfortunately i already sold mine so i can't test it.. but after hearing my friend's, it's not that loud without the box
Without the box you could actually lose power due to hotter intake temps than the stock unit. If you want an intake with a bit less noise then go with a cold air intake that has the filter in the fender.
It will sound about the same from the outside, but less noise will make it to the cabin.
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Old 01-19-2013, 03:54 PM   #28
GrumpyPitbull
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Originally Posted by Elky View Post

Without the box you could actually lose power due to hotter intake temps than the stock unit. If you want an intake with a bit less noise then go with a cold air intake that has the filter in the fender.
It will sound about the same from the outside, but less noise will make it to the cabin.
Yeah, he will definately lose power without the airbox.

The great thing about the Cobb airbox, is that it utilizes the factory snorkel .... People forget about this.

So not only is it pulling air from the fender, but also from the snorkel. I can assure you the Cobb SF with airbox is as good or better than any CAI in terms of pulling ambient air. Without the box, this is not the case, and the intake will be sucking in hot engine bay air.

So that's my .02 to all thinking about a short ram intake. Go with one that has a box, and uses the factory snorkel.
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Old 01-19-2013, 06:32 PM   #29
bacalhau16
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Originally Posted by GrumpyPitbull View Post
I can assure you the Cobb SF with airbox is as good or better than any CAI in terms of pulling ambient air.
Kind of a bold statement here. I do like that it uses the snorkel and all, but for a filter that is housed in the engine bay, Id think being better at achieving colder ambient temps then a true CAI would be really hard to do.

Not a very hard test to prove I suppose. Someone loan me their Cobb intake and I'll put it against my AEM.
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Old 01-19-2013, 08:13 PM   #30
mrkyle3
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Originally Posted by bacalhau16 View Post
Kind of a bold statement here. I do like that it uses the snorkel and all, but for a filter that is housed in the engine bay, Id think being better at achieving colder ambient temps then a true CAI would be really hard to do.

Not a very hard test to prove I suppose. Someone loan me their Cobb intake and I'll put it against my AEM.
Eventually I'd like to get a CAI but I'm too scared of it sucking up water.
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Old 01-19-2013, 09:00 PM   #31
GrumpyPitbull
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Originally Posted by bacalhau16 View Post

Kind of a bold statement here. I do like that it uses the snorkel and all, but for a filter that is housed in the engine bay, Id think being better at achieving colder ambient temps then a true CAI would be really hard to do.

Not a very hard test to prove I suppose. Someone loan me their Cobb intake and I'll put it against my AEM.
The Cobb pulls air both from the fender well, and the snorkel. Also, the filter sits way to the left ... So close to the fender that its tough to get it out, and about as far from the engine as possible without being down in the fender. I can snap some pics later if you guys are interested.

I'm not knocking cai's at all, just saying the Cobb intake with box is very well designed for a short ram .. and pulls in outside air from multiple locations, and not just from an enclosed fender well.
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Old 01-19-2013, 10:25 PM   #32
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Originally Posted by GrumpyPitbull View Post

The Cobb pulls air both from the fender well, and the snorkel. Also, the filter sits way to the left ... So close to the fender that its tough to get it out, and about as far from the engine as possible without being down in the fender. I can snap some pics later if you guys are interested.

I'm not knocking cai's at all, just saying the Cobb intake with box is very well designed for a short ram .. and pulls in outside air from multiple locations, and not just from an enclosed fender well.
My tuner didn't like my AIT's at idle or when shut off while still hot and as for the air box goes it is a very poor design as far as keeping radiant heat from engine entering in the airbox area. Although gives the engine bay a nice accent and utilizing the oem air scoop, don't get me wrong it works well while the car is moving. Had to do some heat preventative measures with some of DEI's gold tape but still not as good as a true CAI. Just my 0.2
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Old 01-19-2013, 10:28 PM   #33
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If you have a COBB sf and it is working with your car with no issues, then I wouldn't change a thing.

I hate that newer WRX's are so inconsistent with intakes. I've seen as many members have knock issues with their sf, as there are members with an AEM. (I mention these because COBB has maps for these on 08+. If you are using something else, clearly you will have issues)
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Old 01-20-2013, 12:43 AM   #34
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Originally Posted by trev762 View Post

My tuner didn't like my AIT's at idle or when shut off while still hot and as for the air box goes it is a very poor design as far as keeping radiant heat from engine entering in the airbox area. Although gives the engine bay a nice accent and utilizing the oem air scoop, don't get me wrong it works well while the car is moving. Had to do some heat preventative measures with some of DEI's gold tape but still not as good as a true CAI. Just my 0.2
Yeah, when I said the Cobb with box pulled air as good as a cai, I meant while on the move. I agree the box could seal up better.

My point was not to say cai's suck or anything .. just that I felt the Cobb SF with box was as good as a cai when moving due to its use of the snorkel.
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Old 01-20-2013, 02:03 AM   #35
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Gotcha. Much different when what u first said and I still disagree, but gotcha. lol
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Old 01-20-2013, 07:14 AM   #36
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Gotcha. Much different when what u first said and I still disagree, but gotcha. lol
Umm no, it's no different ... I guess I just should have been more specific that I meant when moving.

This debate has raged on for many years not only for Subaru's, but for every car that both Cobb and AEM make an intake for ... and I promise it won't be settled here.

CAI's on the 08+ models sit in an enclosed fender-well with like 5 little drain holes in it at the bottom of the liner. So while the SF's are closer to the engine, the CAI's are not exactly getting a huge rush of fresh outside air. They are simply sitting a few inches further away.

I have learned in my many years of messing with cars that when an argument goes on and on, that they are typically about the same ... which was the point I was trying to make. The AEM sits further away from the engine, but the Cobb with box uses the snorkel to get extra air.

For the people in this thread looking for advice, I would say stick with the stock box if your looking for performance ... there are better options for the money. If you really just want the sound, both the AEM and Cobb are good intakes, just make sure if you get the Cobb you also get the box.
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Old 01-20-2013, 10:21 PM   #37
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On my 2011 sti I find the issue with the SF box is heat entrapment It is made of metal and therefore is absorbing and trapping the ambient engine heat, especially with the cover installed. Removing the cover helps, but its still exposed to the heat. I replaced it with the oem box and air temps dropped 20 degrees. The plastic box actually insulates the incoming air from the underhood temps, and if you remove the plastic bottle you'll actually have a second source of cool air entering the air box from the fender well....all for free.
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Old 01-21-2013, 03:02 AM   #38
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Originally Posted by jaboyd View Post
On my 2011 sti I find the issue with the SF box is heat entrapment It is made of metal and therefore is absorbing and trapping the ambient engine heat, especially with the cover installed. Removing the cover helps, but its still exposed to the heat. I replaced it with the oem box and air temps dropped 20 degrees. The plastic box actually insulates the incoming air from the underhood temps, and if you remove the plastic bottle you'll actually have a second source of cool air entering the air box from the fender well....all for free.
Do you have IAT data to back up your claim?
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Old 01-21-2013, 05:29 AM   #39
trev762
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Originally Posted by jaboyd View Post
On my 2011 sti I find the issue with the SF box is heat entrapment It is made of metal and therefore is absorbing and trapping the ambient engine heat, especially with the cover installed. Removing the cover helps, but its still exposed to the heat. I replaced it with the oem box and air temps dropped 20 degrees. The plastic box actually insulates the incoming air from the underhood temps, and if you remove the plastic bottle you'll actually have a second source of cool air entering the air box from the fender well....all for free.
Huh/

On my 11 sti the box itself is just fine besides the huge open gaps where engine bay radiant heat can enter and as for removing the lid would not help and would make things even worse.

As for the stock box which just fine for even 400+HP but by removing the air snorkel silencer without plugging the hole will decrease HP as much as 50hp due to air turbulence I think one tuner had mentioned when they were tuning an sti.
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Old 01-21-2013, 06:50 AM   #40
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Also keep in mind that you hear it a lot louder inside the car than outside...
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Old 01-21-2013, 09:18 AM   #41
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My tuner did the test, so no I don't have access to data.

Interesting comment on plugging thr hole for the plastic bottle. My car was tuned with it in place and when I opened it it didn't feel (seat of the pants) as quick......you may very well be correct about less performance with it open
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Old 01-23-2013, 05:14 PM   #42
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I had my installer put this on yesterday and take it off today. The noise was ridiculous - I felt like a riced-out cop-magnet. Unless you need the SF to support other mods, I would stay away.
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Old 01-25-2013, 05:13 PM   #43
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I am able to compare the cobb to the K&N.

My K&N typhoon was way louder than my cobb SF (I am not running the Box)

The K&N also retained a lot more heat It was not uncommon to get temps in the 150f range at idle on a hot day where my cobb only sees 130f max.

Is it louder than stock yes it certainly is. I took my K&N off and sold it due to it being loud and I was running a stage 2 ots from cobb and it did not like the k&n at all.

Went back to stock and tune was fine and it was quiet. Honestly unless you are making 300hp or more I don't know the magic number but stick to stock and save your money.

I got the cobb SF as I am now front mount on a dom 3 XTR.
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Old 01-25-2013, 06:42 PM   #44
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I recently installed an SF Intake and other crap, and while I'd say the intake (with box in my case) is notably louder, it's not very much more so. In my case, I'm highly against loud stuff in my car; I won't even run a catback louder than the STI for that reason. (I had one of the quiet catbacks, the Maddad Whisper, and it's loud as hell IMO.)
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Old 01-25-2013, 08:31 PM   #45
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i love my cobb intake/box... like that air swirling noise of the turbo sucking stuff in, lol
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