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Old 11-01-2012, 08:24 PM   #326
09subi2.5i
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i know this is going to annoy people but i just really want to stress this issue. The Rallisport UEL headers for 2.5i's are 100% direct fit?
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Old 11-01-2012, 09:10 PM   #327
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Yep, just take your time and it should go smooth
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Old 11-06-2012, 06:20 PM   #328
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Good write up
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Old 01-11-2013, 12:55 AM   #329
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Found uel headers and stromung high flow cat kit can I bolt any cat back to it ?
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Old 04-03-2013, 02:44 PM   #330
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Sorry to comment in an old thread, but everyone is talking about the 2.5i. Will the ebay uel headers bolt right on the 2.5RS? I just want to make sure because no one has said anything about the RS, just the 2.5i.
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Old 04-05-2013, 12:54 PM   #331
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just bought some ebay knockoffs they worked fine. easy install
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Old 04-05-2013, 12:54 PM   #332
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Quote:
Originally Posted by AbsoluteBugeye View Post
Sorry to comment in an old thread, but everyone is talking about the 2.5i. Will the ebay uel headers bolt right on the 2.5RS? I just want to make sure because no one has said anything about the RS, just the 2.5i.
yea they bolt right on for a 2.5rs
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Old 05-31-2013, 09:04 PM   #333
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It's been a long time, but I have an update!

A few months ago, my car hit 60,000 miles (I know, I don't put miles on very quickly), and when I took it in for service, I was told there was a hairline crack on my headers/exhaust manifold (whichever term you use).

I forgot about this (whoops), and was driving the other day when all of a sudden my car started making a large metallic rattling noise similar to old beat up muscle cars. Got home, looked under, and one of the pipes completely severed.

Since I've been out of the market for a while, does anybody have any recommendations for what to get to replace these? I'd like to keep the cost low.

I know when I got these, Borla's weren't the best and it was just an "Any aftermarket brand will do", but I'm not sure if the market has changed in the past 4-5 years.

Also, sorry for not getting back to a lot of you! I was working nearly full time while going through college in three years, so I had no spare time at all for a really long period. I will try to get back to some of you and clear my inbox a bit to where you can still send messages.
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Old 05-31-2013, 09:07 PM   #334
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Hah! I was looking through some pages and noticed a lot of people asking questions that I should have answered in my first post. Thank you guys for redirecting these people to the first page where I tried to be as thorough as possible.
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Old 06-01-2013, 10:27 AM   #335
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Quote:
Originally Posted by ZeppelinPie792 View Post
Hah! I was looking through some pages and noticed a lot of people asking questions that I should have answered in my first post. Thank you guys for redirecting these people to the first page where I tried to be as thorough as possible.
I remember this thread from like 4 years ago lol. I ran the Borla UEL setup for about a week then ditched it for a LGT stock manifold modded to mate to my otherwise stock exhaust. Cost was $120 for the stock manifold, O2 extension, flange and bungs. Cost me $165 for the cut of the UP connector and a welding on of the three bolt flange piece.

Much much better than the Borla style setup, durability is OEM and OEM is 4 life

Parts:


Installed:





Sound:


or go RalliSport (what I would do)
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Old 06-02-2013, 07:11 PM   #336
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Damn, I wish I knew that four years ago. Easily a much less expensive solution than mine.
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Old 06-04-2013, 02:45 PM   #337
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Quote:
Originally Posted by guciodog11 View Post
$580 ROFL

get this
http://cgi.ebay.com/ebaymotors/Subar...spagenameZWDVW
and this
http://cgi.ebay.com/ebaymotors/Catba...spagenameZWDVW

use your stock cat for a total of 273........
How do you know which EL headers specified as WRX or STI headers will work on a 2.5i model? Is there a range of years that have the same bolt pattern that can translate from a turbo model to a non turbo model? I have an 07 impreza 2.5i and have lived in the snow of CT and right on the beach in CA and it has taken a serious tole on my exhaust. I am so rusted out and together that i need to basically replace from the headers back. Anyone have a good suggestion other than replacing stock for headers back on a 07 2.5i?
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Old 08-20-2013, 01:02 AM   #338
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new to subaru world. thanks for the write up, looks expensive. its hard living in alaska and dealing with this damn shipping costs
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Old 08-20-2013, 08:07 PM   #339
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Quote:
Originally Posted by GEE-OTTO View Post
I remember this thread from like 4 years ago lol. I ran the Borla UEL setup for about a week then ditched it for a LGT stock manifold modded to mate to my otherwise stock exhaust. Cost was $120 for the stock manifold, O2 extension, flange and bungs. Cost me $165 for the cut of the UP connector and a welding on of the three bolt flange piece.

Much much better than the Borla style setup, durability is OEM and OEM is 4 life

Parts:


Installed:





Sound:


or go RalliSport (what I would do)

ok, so what youre saying is, for my 2010 2.5 impreza, i can just buy legacy headers? im sorry super noob
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Old 02-11-2014, 05:11 PM   #340
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Default Borla Headers Warranty Question!!

Hey everyone!

I've been trying to decide whether to buy the $400 Borla UEL Headers for the 2.5RS or to buy the Ebay knockoffs for about $150-200. Since I heard quality and proneness to cracking is about the same (which is kind of sad on Borla's part in my opinion), the only thing thats got me torn is the Million Mile Warranty.

However, after reading the Million Mile Warranty page carefully on the Borla site, I read this in the last paragraph: "This warranty is valid for BORLA® street-legal products only and does not apply to any racing products or street products used for racing purposes." Borla's page for the headers clearly states: "This product is for Racing or Off-Road Use Only."
Does this mean that the warranty does not apply to the headers?

Also, I'm planning to put the headers on a 2006 Impreza 2.5i... However, after once again reading the Million Mile Warranty carefully, the last paragraph also state: "This warranty does not include the cost of removal or reinstallation of the product, and does not apply if the product has been damaged by accident, abuse, misuse, or misapplication."
Does putting the headers on a 2006 2.5i count as "misapplication" and will this void the warranty?

Thanks!
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Old 01-26-2016, 03:04 PM   #341
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Quote:
Originally Posted by ZeppelinPie792 View Post
As we all know, our 2.5i's come with the dreaded equal length headers. Some like them for the rumored performance gain over unequal length headers, and others hate them for their sound. I am in the latter category. Just know that whatever you do, either one will be better than your stock "exhaust manifold" because you will most likely be getting rid of a catalytic converter.

So if you are balls out performance, go ahead and get yourself some OBX equal length headers that supposedly bolt right up. But if you want that boxer rumble, you will most likely need unequal length headers.



Step 1: Deciding if you really even want to go through with it:

This will be expensive, and it will be time consuming. It may also be quite aggravating. You will have to replace your entire exhaust, and get an extension cable for your rear O2 sensor. I am 95% sure you can not use any stock part, and you MUST replace everything (except your O2 sensors). Let me do a quick rundown on the estimated prices without shipping:

Cheap
Headers: Borla Replicas ($200)
Cat pipe: Used 2.5RS Catpipe ($75)
Cat Back: Generic eBay Cat Back ($300)
O2 ext.: DIY Soldering ($5?)
_____________________
$580

Expensive
Headers: Borlas ($300)
Cat Pipe: High Flow Cat ($360)
Cat Back: Name Brand Cat Back ($550)
O2 ext.: Rear O2 Sensor Extension ($32)
___________________
$1242


So as you can see, it will be quite expensive. If you are willing to pay that much money, then keep reading.

Just as a side note, I got the prices for the cheap route from things for sale here and eBay. You may not have to extend the rear O2 sensor if it is a 2.5RS cat pipe, but I am not too sure.

The prices from the Expensive route are mostly from boxer4racing.com I mainly used things on here, with the exception of the Borlas.




Step two: Picking out the right parts:

In this section I will offer suggestions for which parts you will need. You want to be sure you have all of your parts before putting your new exhaust on, or it will more than likely not fit.

-Headers:

There are two big options you have here...

1) You can go to eBay and get yourself a pair of Borla Unequal Length Replica Headers. This tends to save you about $100. Most people do this since they claim the quality is as good as, if not better, than Borla's headers.

2) You may also get a pair of Borla headers. A place you can order them from is http://www.boxer4racing.com/ but just know that you will have to phone order. Beware of the earlier generation Borlas, as they are prone to cracking. They are covered by a million mile warranty, which goes to a joke I have heard, "Just get yourself two things of Borla headers. When one cracks, you put number two on while you send the first ones in for warranty work. When number one gets back, number two should be ready to go".

WARNING: IF YOU DO THIS, DO NOT PAY ATTENTION TO ANY OF THIS HOW TO: The third (and unorthodox) option of this is to get a WRX or STi header and modify it to work on our 2.5i's. Here is a link of a forumite named Vizzionz that had done this to his 2.5i http://forums.nasioc.com/forums/show....php?t=1420502

-Cat Pipe:

There are 3 general options here.

1) The cheap thing to do here is to just buy a used 2.5RS cat pipe from an 02-05 RS. This should work fine, and I do not think you have to get a rear O2 extension if you go down this path. (Please message me if I am wrong here)

2) But, if you are like me, you want to get something that you do not plan on replacing. This means a high flow catalytic converter. I got the Stromung high flow cat from boxer4racing.com. The other main choice for high flow cats from my research is the Random High Flow Cat. If you get a high flow cat, under my understanding, you will have to re-locate your female connectors in your engine bay, and get a 24" or so extension for the rear O2 sensor. Also, High Flow cats tend to be quite loud, although they give you better fuel economy and increased horsepower.

3) You can also get a track pipe. This is the cat pipe without the actual catalytic converter. It is only recommended that you do this if your county has no emissions testing (and if you do not really care about the environment).

-Catback:


Not much to say here. Just a mid pipe and tail pipe. One catback that I see recommended a lot is a Stromung cat back. Really, anything designed for an 02 to 05 model will work. The optimal size is 2.25"-2.5" though.

-O2 sensor extension:

Well, I am not too sure about regular 2.5RS cat pipes, but if you get a high flow cat, you will have to get your rear O2 sensor extended. You can either buy an extension for $32, or go in, chop up your wire, and solder it all yourself. I would provide a link on how to splice wires yourself, but I do not remember exactly where I saw a post about it. If someone PM's me this, I will replace this sentence with it.

If you want to just buy an extension, you will need a 24" one from this place:
http://www.casperselectronics.com/mm...gory_Code=SUBU

-O2 Sensor Spacer:

Some people's check engine lights go off, so you may have to get this O2 sensor spacer at http://www.rallitek.com/rao2sesp.html or do a mechanical fix. Here are the steps for the mechanical fix, as from a previous forumite:

Go to autoparts store and buy "Help!" brand spark plug anti-foulers. They look like threaded O2 bungs and come in a red package. You need one each of part number 42002 and 42009.

Take the one with the crush-washer on it (#2) and drill the center out with a 1/2" drill bit (clamp it in a vise and go at it - it's soft metal so the drilling is easy).

screw the #2 together with #1 and put them in between your rear O2 sensor and the bung on the cat. You'll never get the P0420 CEL after that.

My CEL never went off after everything was hooked up, so I believe the extension chord should be fine.


Step three: Putting everything on:

This is pretty much self explanatory. You securely lift up your car, take everything old off, and put your new things on. You will want to unscrew your O2 sensors and put those in your new cat pipe. You may want to use some kind of lubricant to get your exhaust out of the rubber hangers, and maybe even have someone else help you with getting the bolts out. If you have a torque wrench, I think you need to torque it up to 34 ft/lbs. If I am wrong, please message me so I can correct this.

If you do not re-locate your female connectors, this is what will happen to your cables:


(The rear O2 sensor cable is actually not even long enough to make it to the engine bay)

That being said, you will have to re-locate the female connector to the back of your engine bay instead of where it already is. To do this, unless you are extremely dexterous, you will most likely have to unbolt this thing:


(Sorry for the bad picture, but I could not get a good one with the air intake tube in the way. Just know it is under this weird shape



With that off, it should go right through. I actually had to take out the accordion tube in my air intake to get to it. With the 24" rear O2 cable extension on, it should fit right in. I also securely tied them down afterwards.



If your check engine light goes off, you may have to put on the rallitek O2 sensor spacer, or do the mechanical fix. The O2 sensor spacer should just screw in. See the bottom of section two for the mechanical fix. Once again, my CEL did not go off after I had everything hooked up, and I have heard that it shouldn't with the extension cable.



Step 4: Enjoy!

If you get this to all work, congratulations, your car now sounds like a Subaru. My brother always ridiculed me for my car sounding like a Honda when I had only my cat back on. Now, he actually likes the sound. If any of you guys experienced anything like that, it will happen no longer! Now people will ask you if you are packing a V8, or get your car confused for a WRX or STi.


Common Misconceptions/Concerns:

-Some people have said the headers will not fit due to it not clearing the oil pan. Mine are snug as the headers in a bugeye (bad joke, I know). Here is the best picture I could take to prove it wrong:



-If you think the oil filter will be hard to get out, it will be just about the same as the stock headers. I have not had to change my oil at the time of writing this, so I can not tell you the real level of difficulty. It looks like it won't be too hard. Here is a picture to show you about it:




Videos:

If you would like me to post links to your videos here, just let me know. It is always nice seeing the difference these make.

Me:
Before, revving: Subaru Impreza 2.5i Blitz Nur Spec R Catback - YouTube
After, revving (although it does not do it justice IMO): Subaru Impreza 2.5i Blitz Nur Spec R Catback and Borlas - YouTube
After, driving: Subaru Impreza 2.5i Borla Headers driving around - YouTube


Conclusion:

If you want to see my path down doing this, I have a long thread about it here: http://forums.nasioc.com/forums/show....php?t=1424157
But be warned, half of it is just me replying to things. I will try not to do that on this thread.

If you have any comments/concerns/questions/etc or if you see anything in my how-to that needs to be changed, please feel free to PM, IM, or email me. (5 year update: I stopped visiting NASIOC regularly since life got extremely busy for me, and I haven't answered a lot of messages. Then my inbox filled up. Sorry guys!)


UPDATE
Well, I hate to say it, but after 60,000 miles on my Borla knockoffs, one of the pipes severed completely. I was expecting maybe a leak, but not for this to happen. And not so soon. Oh well, replacements incoming.
Great post, thanks so much
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Old 02-21-2016, 11:08 PM   #342
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Figured I'd offer my experience here, because this thread was extremely helpful to me although it is slightly dated now. Nothing new here, but maybe it'll help someone...

Car is a 2007 Subaru Impreza 2.5i.

My path to the glorious uel rumble, and NO check engine light:

- Tsudo headers and high flow cat pipe. This ran me about $340 (iirc) new.

- Tsudo n1 catback exhaust. I was lucky enough to find someone on here selling a used one in great condition for only $100. I did have to buy two new gaskets, the 3 bolt kind that Tsudo uses. Also, if anyone is wondering, the 3 bolt gasket by Vibrant Performance is a perfect fit for a cheap replacement.

- Casper Electronics 24" rear o2 sensor extender. $30, it is worth it.

That is it. I did NOT need to use the provided 90 degree cel eliminator elbow. Rear sensor goes in with the extender, no issues there. Middle bung in the cat pipe plugged with the supplied plug/bolt from Tsudo. Front o2 sensor did need to be spliced... I had my mechanic install this all for me so I can't comment on getting that front sensor to go in without modification.

After all is done and said, exhaust is all on, fits good, no CEL, but hoooooly is it loud. Way louder than my WRX with a 3" turbo back. I was not expecting this, it sounds incredibly good though. But I may be looking into buying the silencer..

One other thing I'll mention is if someone goes the full Tsudo route. The connection to the catback after the cat pipe... The n1 catback is meant to accept a doughnut gasket, to bolt up to the stock cat pipe I'm guessing. However the Tsudo cat pipe has the flat flange. My mechanic used a silicone/gasket type stuff to get a decent seal. But, it's not perfect, just a heads up.

Rumble on peeps!
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Old 05-13-2016, 09:56 AM   #343
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I'm wondering why I don't see anyone talking about a regular oem uel header. I picked up one off a 2001 or 2002 forester I don't exactly remember and I plan to chuck that on. Maybe there's a reason. I'm just wondering if the flanges will link up behind the cat (donut gasket). I feel like the 2.5i exhaust may be bigger but I see no reason why. Anyone have any insight on that it would be awesome. Thanks.

Edit* so i decided to go at it. Am now noticing it isnt completley bolt on. The uel has only one 02 bung on the cat where as the oem el has two bungs infront of the engine. One for 02 and one is afr. Going to see what i can figure out the easiest way as this seems to be a very cheap way to achieve the subie rumble. The flange on my mid pipe is junk and rotting so the best solution I see is good old pipe clamps and 4" of piping to slide over. Might try some flex pipe to keep things safe for winter.

Last edited by Darcz32; 05-13-2016 at 06:49 PM. Reason: Adding info
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