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Old 03-09-2005, 02:42 PM   #1
down_for_the_scooby
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Default Best header for my RS?

I want to put headers on my 02 RS but am not sure what to get. Price range is about 350.00. If anyone has any advice, I'd be open to it. Second, if you have headers, what type gains did you get after the install? Any exhaust ideas would be welcome also.
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Old 03-09-2005, 03:27 PM   #3
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wow, a different take on "do a search n00b"

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Old 03-09-2005, 03:42 PM   #4
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I'll try to be of some help. You're not going to find anything that gains you much power header wise for $350. Borlas are about $290 new but you can find em for around $200 in the for sale forums. Cobb, TWE, MRT and Brullen all make headers but these will run you $500+.
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Old 03-09-2005, 03:43 PM   #5
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werd, best power mod for the buck is a good CAI

Quote:
Originally Posted by Nicklbrso


I'll try to be of some help. You're not going to find anything that gains you much power header wise for $350. Borlas are about $290 new but you can find em for around $200 in the for sale forums. Cobb, TWE, MRT and Brullen all make headers but these will run you $500+.
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Old 03-09-2005, 03:46 PM   #6
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Quote:
Originally Posted by Philistine
werd, best power mod for the buck is a good CAI
Cobb owns all!
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Old 03-09-2005, 03:52 PM   #7
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well i thought that too.. but chances are since he's looking for a header he's already got an intake
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Old 03-09-2005, 03:57 PM   #8
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Quote:
Originally Posted by Nicklbrso
Cobb owns all!
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Old 03-09-2005, 04:16 PM   #9
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Save up for some equal length headers. You won't regret it. See Cobb, TWE, and some others.
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Old 03-10-2005, 12:29 PM   #10
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Quote:
Originally Posted by Nicklbrso
Cobb owns all!
Maybe in the headers I don't know but their underdrive pulleys suck. Unorthodox made a better, lighter and cheaper one.
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Old 03-10-2005, 12:31 PM   #11
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Quote:
Originally Posted by Aphex28
well i thought that too.. but chances are since he's looking for a header he's already got an intake
Actually your half right, I modded the stock air intake to a ram air. I got the idea from another guy on this forum.
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Old 03-10-2005, 12:35 PM   #12
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Quote:
Originally Posted by Nicklbrso


I'll try to be of some help. You're not going to find anything that gains you much power header wise for $350. Borlas are about $290 new but you can find em for around $200 in the for sale forums. Cobb, TWE, MRT and Brullen all make headers but these will run you $500+.
I'm going to play dumb here, can someone explain why even though the borla and the cobb look nearly identical, why is the cobb going to be better. The reason I say this is because from a visual point, there is no real difference is the curves of the piping. (btw thanks to everyone for the ideas.)
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Old 03-10-2005, 12:40 PM   #13
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Just another thing, I just driving the rs until my insurance goes down, (long story), then I'm buying a wrx so I really don't want to mortgage my life away on this car. In the end mods will probably be, underdrive pulley, mod'ed ram air with scoop, headers, full cat-back exhaust, rims, eibachs, strut bars and an 80hp shot through a wet nitrous system.
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Old 03-10-2005, 12:41 PM   #14
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ummmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm. Since when does
this
<--- borla

look ANYTHING like this
<-cobb
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Old 03-10-2005, 12:53 PM   #15
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Quote:
Originally Posted by Aphex28
ummmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm. Since when does
this
<--- borla

look ANYTHING like this
<-cobb
Thats what I was gonna say.
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Old 03-10-2005, 01:19 PM   #16
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I am thinking he was compareing the TWe equil length headers with the borelas, but even that doesnt really compare...
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Old 03-10-2005, 02:15 PM   #17
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Yeah, no comparison.

Just to help tell you the difference... you'll get better gains out of the Cobb because the distance the exhaust has to travel per exhaust housing is the same. This helps increase the efficiency of flow through the headers, and thus will yield better gains.

Subaru's signature boxer sound is achieved partially due to the beautiful boxer engine under the hood, and partially due to the exhaust manifold's unequal length. In purchasing the borla's you'll find gains higher than with a stock manifold, but not quite as high as the Cobb or another company manufacturing equal-length headers (Cobb's not the only company making them).

So, yeah, that's the info in a nut-shell. Oh yeah, and umm...... SEARCH THE FORUM!!!

Unabomber's FAQ is located in the Newbie Forum under "Unabomber's Manifesto". If you don't want to search for it again, bookmark it. He's posted information on pretty much any upgrades you could want to put on subies, they're incredibly thorough, and he's put a lot of attention to detail into providing an unbiased opinion.

David
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Old 03-10-2005, 04:27 PM   #18
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Default Save for the COBB

Look at it this way if you plan to get a High-Flo cat too.

Borla Header=$299
+
Stromung High Flow Cat=$349

Total=$648

-OR-

COBB Equal length header with Hi-Flo Cat=$749

For an extra $100 you get waaaay better performance gains.

This is the best way to look at it to if you want the full benifit of a header system.

This is what i'm saving for.

But then again if I find a Borla used for $150, i'd use that for a while.

-SGT
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Old 03-10-2005, 04:29 PM   #19
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What David said about the Cobb also goes for the MRT, Brullen and TWE headers, all being equal length but having slightly different designs.
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Old 03-10-2005, 06:50 PM   #20
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Sorry for the topic drift here. I read that the new JDM N/A Forester is 2.0 with an equal length exhaust manifold. Does anyone know if they'll do that for the US 2.5 also? That would be cool, as then we could have an equal-length header that wouldn't flunk CA emissions inspection. As best I can tell, no aftermarket header, let alone equal length header is CARB approved.
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Old 03-10-2005, 08:38 PM   #21
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Quote:
Originally Posted by doster82
Subaru's signature boxer sound is achieved partially due to the beautiful boxer engine under the hood, and partially due to the exhaust manifold's unequal length. In purchasing the borla's you'll find gains higher than with a stock manifold, but not quite as high as the Cobb or another company manufacturing equal-length headers (Cobb's not the only company making them).David
Hi David!

Can you show proof of this with evidence from a mere mortal and not Cobb himself? I haven't seen any.
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Old 03-10-2005, 09:38 PM   #22
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strictly from hearsay:

sound = borla

performance = anything equal length
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Old 03-11-2005, 11:01 AM   #23
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Kevin,

No, I don't have any proof that there are any gains between equal length and unequal length, other than the gains from what Cobb has posted. However, based on a theoretical perspective, because the distance of airflow out of the header is always the same, this would help to reduce any possible conflicting ammounts of pressure, thus reducing back-pressure through the header, and allowing for better gains.

If you look at Unabomber's Header FAQ, there was a study conducted by a shop somewhere, but it utilized WRX's, not NA subies. This study showed that there actually was no difference in the hp gains, and the headers simply shifted the power band, placing the max torque and hp in different area of the power band.

All of this aside, all information I have on the subject of purchasing headers is through threads I've read on this forum, and through my own basic knowledge of physics. It just seems to me that you're getting less sound, and better gains through an equal length header because of reduced back pressure (which would yield softer acoustic volume, less reverb, and better airflow=more hp) rather than an unequal length header (louder acoustic volume due to reverberation throughout the header, which would increase backpressure, and reduce the maximum hp gains).

If I'm not making sense, or this doesn't sound accurate, please let me know. I'd appreciate any clarification on the subject, and if the same hp gains can be achieved between unequal length and equal length headers (in a NA subie) I'd really appreciate the information.

David

Cliff's notes:

[quote] Can you show proof of this with evidence from a mere mortal and not Cobb himself? I haven't seen any. [quote]

Nope, I've seen no proof. It sure makes sense that you'd get better gains from equal over unequal, though.
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Old 03-11-2005, 03:48 PM   #24
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I dunno about physics either, but I do know that my car pulls way harder and redlines noticeably faster with the brullen header.
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Old 03-11-2005, 07:18 PM   #25
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I've read that people have had problems burning out O2 sensors when they've had the CObb header installed on their rs, other people have had problems with the CEL coming on when the exhaust has had time to warm up. check the forums page on the Cobb website to see what I'm trying to get at. (Technical section, Impreza rs/ts subsection, then "Headders and changes over time").
Has anyone on this site has similar problems? I'm looking to blow my tax rebate on either Cobb or Borla headers and a Stromung cat back exhaust system. I don't want to have to constantly reset the computer if Cobb's are prone to causing ecm problems.
Much appreciation for any help.
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