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Old 01-16-2008, 09:26 PM   #1
The Blue Pilot
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Default Exhaust Question for a QUIET Exhaust..

Hey guys,

Quick question before I make my purchase.

Car:
2005 2.0
Invidia UP/DP with HKS carbon-ti exhaust
K&N Typhoon SRI
Cobb AP v.1 'protuned'

I've grown tired of my exhaust drone on the highway, along with the unnecessary attention i've been getting from cops. I want a nice, quiet, aftermarket exhaust for my car, something that doesn't drone on the highway and is about as quiet as stock while idling/cruising (stock one is way too restrictive...)

I was thinking about getting the Cobb catback along with a catless cobb downpipe, since cobb's catback won't mate to the invidia downpipe properly.

1. Any suggestions on any other exhausts I might want to reconsider going with? I've heard the borla hush and maddad whisper, and I don't know if it was video quality or what but they sounded like crap, and I feel like they have this drone that nobody talks about.

2. Also, will the smaller exhaust affect my tune that I got with the larger one?

Thanks all

EDIT: Can I run the stock wrx or stock STI axleback mated to the remenants of the HKS exhaust? (ie no stock midpipe?)
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Last edited by The Blue Pilot; 01-18-2008 at 12:15 AM.
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Old 01-16-2008, 09:32 PM   #2
Master2192
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Cobb is loud as hell...

Borla Hush
or my favorite, Greddy Evo2
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Old 01-16-2008, 09:41 PM   #3
The Blue Pilot
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^^are you serious?

Greddy Evo2 WAS my first choice, but apperantly some have fitment issues?

Last edited by The Blue Pilot; 01-16-2008 at 09:55 PM.
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Old 01-16-2008, 09:42 PM   #4
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SPT FTW, Stock look, nice boxer rumble sound at WOT and keeps cops looking forward as they pass going the other way.

You can still retain the size with SPT.
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Old 01-16-2008, 09:44 PM   #5
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1. prodrive

2. probably not unless it was a super aggressive tune. you should be fine. at least contact your tuner and see what they say. but im sure its totally fine.
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Old 01-16-2008, 09:50 PM   #6
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too bad M2 isn't selling subie parts anymore...they were importing a austrailian setup that is very quiet yet straight-thru.
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Old 01-16-2008, 09:55 PM   #7
The Blue Pilot
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Side question: do you guys think it would matter if I went back with my stock axleback? Or maybe stick on a STI axleback on there? Would it affect the tune?
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Old 01-16-2008, 10:14 PM   #8
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I'm in the same boat.

My Prodrive muffler + stock resonator section was pretty quiet. Perfect, in fact. I've since moved to a 3"-->2.5" non-resonated straight-pipe (in place of the resonated stock section) and it's now loud as heck. I *really* like the sound of the Prodrive, but the highway drone is driving me nuts.
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Old 01-16-2008, 10:30 PM   #9
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I think the STI axleback would be perfect...with the remains of the HKS carbon-ti that is...
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Old 01-16-2008, 11:01 PM   #10
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^^any opinions on this?
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Old 01-16-2008, 11:12 PM   #11
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Quote:
Originally Posted by The Blue Pilot View Post
^^are you serious?

Greddy Evo2 WAS my first choice, but apperantly some have fitment issues?
I have a greddy evo 2 on my 05 wrx. All you have to do is get some kartboy exhaust hangers. Its great. I havent been pulled over because its not too loud. no droning on the highways.
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Old 01-17-2008, 12:07 AM   #12
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How about the WBR catback. Its a full 3" available with a black can. Sounds beautiful. Compares to the Maddad maybe quieter. Looks almost stock. Never had a cop look twice.

500 shipped doesn't get any better. Just run some KB XL hangers and your set. Or the axleback (keep HKS mid) for 300 shipped.

Also, i am running the TXS stealthback (catless) with WBR black axleback.
Its about as loud as a 350z. (different note of course)
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Old 01-17-2008, 12:14 AM   #13
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i have a borla hush with only one cat and it sounds as loud as an STi at idle and the highway.
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Old 01-17-2008, 12:24 AM   #14
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I have a Borla Hush mated to a TXS down and mid pipe. No drone on the highway but it is loud when you get on it.
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Old 01-17-2008, 01:00 AM   #15
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if the Cobb won't work with your DP, neither will the STi. Both use the same stock -sized donut gasket.
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Old 01-17-2008, 02:05 AM   #16
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Quote:
Originally Posted by The Blue Pilot View Post
Side question: do you guys think it would matter if I went back with my stock axleback? Or maybe stick on a STI axleback on there? Would it affect the tune?
I was wondering this myself. So I hope someone gives an answer.
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Old 01-17-2008, 11:59 AM   #17
FromageTheDog
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Quote:
Originally Posted by kylelikewhoa View Post
I was wondering this myself. So I hope someone gives an answer.
Stock axleback is known to be very restrictive -- see here:
http://forums.nasioc.com/forums/showthread.php?t=899213

The STi axleback flows almost as well as the Prodrive while being almost as quiet as stock:
http://forums.nasioc.com/forums/showthread.php?t=898368
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Old 01-17-2008, 12:07 PM   #18
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Talking Evo 2

I personally think you need to keep the exhast flow open enough for the tune you have. If you restrict that opening you will affect your ability to push the extra power from the tune through the engine, turbo, and exhaust. Use an Greddy Evo 2 like others have said. I know many guys at a real respected shop that run them for some serious horsepower set-ups. I have one on a stage two set-up. Quiet, yet there at idle and cruising, and nasty when you get on it. Truly the best of both worlds. Oh and I do not have any fitment issues. Perrin UP, Cobb DP, and Evo 2 Catback. Does not shake, rattle, or cause me any problems.

Just my two cents! or three!!
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Old 01-17-2008, 12:11 PM   #19
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Get a Greddy SP2, You will Love it.

Perfect Exhaust for a Daily Driver.
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Old 01-17-2008, 12:15 PM   #20
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if you stuck on your more restricting catback, it would affect the power of your car. Correct me if I'm wrong, but I imagine you'd be running a little richer since it's not as freeflowing?

Quote:
Any suggestions on any other exhausts I might want to reconsider going with? I've heard the borla hush and maddad whisper, and I don't know if it was video quality or what but they sounded like crap, and I feel like they have this drone that nobody talks about.
Define what you mean by "crap"

The maddad whisper is pretty quiet. Did you see the video that Daddysscp had up for his twin tip exhaust? Doesn't sound that bad imo

I had the greddy evo 2 mated to a PDE catted downpipe but sold it. Reason being is because for MY car there was fitment issues. I had to use long exhaust hangars so the exhaust was hanging too low and it really ticked me off. Also the tip looks like a fart cannon which I'm not overly fond of.

After that I was split between the Cobb catted TBE and the APS R1" catted TBE. I went with APS and have not regret it since. Doesn't really drone as much as the Greddy did. It is slightly louder (according to that DB spread sheet it says it's around 94 where greddy is like 92/93?). Plus it's a full 3" all the way through. I did not go with the cobb because it tapers at the midpipe and is louder than the APS by a few db.

They both cost nearly the same and will be louder than the Greddy Evo 2, but a lot quieter than any titanium exhaust.
They both look nearly stock.
They both fit with no problems.
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Old 01-17-2008, 05:15 PM   #21
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Quote:
Originally Posted by Master2192 View Post
Cobb is loud as hell...
You think so?! You must have never heard an ERZ (ebay) catback before!
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Old 01-17-2008, 10:49 PM   #22
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tuebo xs stealth back mated with a borla hush should do the trick good performance and pretty quiet at idle
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Old 01-18-2008, 11:54 AM   #23
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Quote:
Originally Posted by The Blue Pilot View Post
[color="Black"].

1. Any suggestions on any other exhausts I might want to reconsider going with? I've heard the borla hush and maddad whisper, and I don't know if it was video quality or what but they sounded like crap, and I feel like they have this drone that nobody talks about.
More than a 1/3rd of the guys that have bought a Whisper replaced an existing 3" CB they areleady had. Either because the previous system was just overall too loud, or they droned something nasty. It doesn't take but a trip to the Whisper review forum to see some of these comments straight from the folks that replaced their previous setup. As far as listening to audio clips I have to agree some come across different than others. It's always tough when listening to a clip. Try some of these on for size. Good luck in the search...

http://www.youtube.com/watch?v=nGj0REuyCmE
http://www.youtube.com/watch?v=WlP44UIccFU - keep in mind the "garage" acoustics play into the tone a bit.
http://video.google.com/videoplay?do...63306630703812 - ripping it up on the dyno. Full maddad turboback(catted madad bellmouth). Also note the stock hp/trq #'s were with the tbe installed but not tuned. I don't think they got a baseline.
http://video.google.com/videoplay?do...50533885099256 - same guy having a little fun driving around town. This one runs just under 2 minutes and a variety of driving situation(inside car, outside car, drive by, ect.)

R.
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Old 01-18-2008, 02:18 PM   #24
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i have 3inch catless dp, 3 inch mid pipe and just had the muffler shop customize it do i can bolt on the sti axle back..its quiet.
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Old 01-18-2008, 02:24 PM   #25
The Blue Pilot
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Thanks for the helpful comments guys..

But I think i'm just geared towards getting either a stock STI axleback or putting back my stock WRX axleback. I really would like to know if it would affect my tune or not (I would call my tuner but I believe their closed for the long weekend...and if I get a solid answer I can do the swap this weekend).

Thanks!!!!
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