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Old 03-13-2013, 10:45 AM   #1
snowcrash75
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Member#: 347078
Join Date: Feb 2013
Chapter/Region: Tri-State
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Default 06 Wagon - Sound Profile - Cobb Catback VS STi

OK, before the flame, I used the crap out of the search function

Because the words "cobb sti catback" are so popular, I had difficulty finding any specific threads or answers (or video clips on youtube with sound) that were directly relevant to my question, but I'm not adverse to a link if someone knows the way...

I have an 06 wagon and I'm about to have the Cobb catted DP installed. I looked at my shop's list of rates and it's $10 more to do a catback at the same time, so putting off that purchase seems like it would be a waste not to do at the same time. I really like the sound of the Cobb catback, and that was the plan, but the extra $600 is not really something that I'd like to part with right away, as I just bought the car two weeks ago...and a short shifter...and the downpipe...and AP. My wallet hurts right now.

Soooo, does anyone out there have any advice/experience as to the end result difference of going with an 06 STi catback instead of the Cobb?

I really want the rumble the Cobb provides, but nothing super loud and obnoxious. This seems perfect:

I know the catback really changes nothing BUT the noise level, I'm only looking for gains in my ear holes by doing this mod. If I could get a used STi catback in nice shape for <$200, and get VERY SIMILAR results, I would rather save here...

Anyone?
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Old 03-13-2013, 12:48 PM   #2
daseca07
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Location: Wheaton MD
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get the cobb catback. if i were to switch from my turbo xs rfl it will be the cobb or id just get the standard turboxs muffler. my friend had a cobb turboback (catless) i love how it sounds nice deep rumble even deeper on a decel but not abnoxiously loud. great fitment too i installed it for him except the downpipe.
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Old 03-13-2013, 12:58 PM   #3
snowcrash75
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I'm with you, I KNOW I want the Cobb, I know its awesome...its just soooo many beans right now.

Has anyone out there run both on their '06 wagon, or heard someone who has Cobb DP/STi catback? I'm really wondering how big a difference there is in exhaust notes. I've heard the Cobb, just not the STi...
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Old 03-13-2013, 01:14 PM   #4
tuzzio
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Buy a JNA "generic" cat back. It's a Cobb replica. I've had them, and they're awesome and sound great. Fitment is quality as well, you may want some XL hangers though. Also, the STI catback is quiet and restrictive IMO unless you change the midpipe
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Old 03-13-2013, 02:31 PM   #5
GrumpyPitbull
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Just wait then?

If you know what you want, but can't afford it right now, then save for it. If you buy some Chinese knockoff, you will only wish you had bought the Cobb later.

I wouldn't worry about having it installed, its not like bolting on a catback is difficult.
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Old 03-13-2013, 04:31 PM   #6
snowcrash75
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A valid point, and saving for it is definately plan B. Chinese knockoff is not in the works. Just spotted a STi catback with triple digit miles for $150, figured that might get me the rumble I want without the price tag...just unsure if the sound would be comparable. I could use that other 450 towards some sways....
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Old 03-13-2013, 04:31 PM   #7
kilfarsnar
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2006 WRX Ltd Wagon
CGM, VF39 Brentuned

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I used to have an STi axle-back on my '06 wagon mated to a TurboXS stealthback setup. I now have a Greddy Evo 2.

The STi muffler had a deep tone just off idle, until about 1500 RPM. Then it got pretty quiet. It didn't sound too much louder than the stock muffler, and it had no boxer rumble. I heard a lot of turbo flutter, probably because of the huge bellmouth on the downpipe (it's the old 4 incher). I was unimpressed, but it was a muffler. The Greddy I have now sounds much better, and similar to the Cobb. I actually think the Cobb sounds better, but I also didn't want to fork out the dough.

If I were you I would just use the STi muffler for now and upgrade to the Cobb when you have the money. You could install it yourself once you get it to save on the labor. It's really not that hard at all; just a handful of bolts.

If you are using generic OTS maps you won't see any performance difference. HOWEVER, of you get protuned install the Cobb beforehand. I was protuned with the STi muffler and put down 225 WHP and 299 WTQ. I got re-tuned after the Greddy install and put down 245 WHP and 288 WTQ. I picked up 20 WHP because the Greddy was so much better flowing than the STi. I lost torque because back pressure was reduced. I got the torque back by installing a VF39: 285 WHP, 325 WTQ.

So I say go with the STi and install the Cobb yourself when you can afford it.

Last edited by kilfarsnar; 03-13-2013 at 11:00 PM.
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