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Old 07-24-2013, 11:29 PM   #1
xDubzx
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Default A Subaru That Will Never Rumble

Thats how Im seriously thinking about my Subaru where no uel headers can seem to work with mine... anyway heres the story:

Since theres not really anywhere else to ask this question here goes. I have a 2005 Legacy (not Impreza) 2.5i and brought UEL headers from DNA Motoring that were made for a 96-05 WRX. I was told that WRX headers were compatible with 2.5RS's. And that 2.5RS's are compatible with 2.5i (Legacy) headers. I brought the headers to at least 6 muffler shops and they told me theres no way theyre going on even with modifications and they told me to buy things that were made for my car. But they do not make bolt on headers for my exhaust setup.

These are what my headers look like from DNA Motoring:


Theyd fit right on the engine but it wouldnt connect with the rest of the exhaust and the trannys in the way. I was also told that if I brought headers for 05 and 05 models only that the headers bolt right on with no problems. I also asked this same question to a legacy forum but they really couldnt tell me anything other then that I have a rare 2.5i Legacy (a pre PZEV version?) made in late 04- early 05 Legacy that is a different setup than most 05 Legacies.

This are the best pictures I could get of my header setup all the way to my cat:








My question is do I need to get UEL headers this style?

With this style it might not get in the way of anything because the DNA motoring headers interfere with my tranny and will line up with the rest of my exhaust? Or that maybe stock Legacy GT headers could be hooked up but it'd be a real challenge either way.

The only choice that one person told me with the same exhaust setup is to get Subaru Outback H6 OBX headers. But these are equal length headers and he told me that they still have to be slightly modified to put them on directly. He said it does have a tiny more rumble than stock headers because of theyre less symmetrical than the stock headers, but he doesnt have any videos up so I am not convinced if anything will work uel wise for my extremely long headers so she might not ever rumble. Thanks for reading my long post Im just looking for any way I could get a rumble and I dont have too many choices to look at.
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Last edited by xDubzx; 07-24-2013 at 11:37 PM.
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Old 07-25-2013, 08:03 AM   #2
Jr_gosetto
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Well from the what I can c and wat I know the 05 rs and 05 legacy are completely differant the exhaust manifold on my 05 RS flange points toward the passenger side and then starts to bend slightly around the cats then goes to the back but I'd say if u want to use ur uel headers buy a 2001 outback exhaust they should b similar Length as ur legacy and they use the same headers as the 05 RS ( I own an 01 outback and a 05 rs that's how I know
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Old 07-25-2013, 11:23 AM   #3
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Another problem is that your cat has a dual inlet. There is no way to make that header work with it.

As stated above you would need to change out the entire exhaust.
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Old 07-25-2013, 11:43 AM   #4
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And how in the way is the tranny bc if you only need about a half inch add a little heat and locate it where you need it
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Old 07-25-2013, 12:13 PM   #5
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The configuration of your header looks very similar to the '01-04 EZ30D (6-cylinder) header, but it looks like yours has dual exhaust ports on the head. (The EZ30D has 1 big oval port; I vaguely recall reading here long ago that the PZEV cars were the same as the EZ30 header, with that same single oval port.)

As stated above, you're most likely going to have to change out the entire exhaust if you want to add any sort of different header configuration. You would have to spend some time looking under other cars to compare where the forward end of your mid-pipe (just after the 2-into-1 cat) is located relative to the mid-pipe on Legacys/Imprezas with the other exhaust configuration.

I don't particularly understand your comment about "the tranny[']s in the way". The tranny is in the same spot on your car as it is on every other Subaru.
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Old 07-25-2013, 12:14 PM   #6
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youll have 0 rumble with any kind of equal length headers, just saying. and i dont think youll be able to run uels unless you have some cash to spend
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Old 07-25-2013, 12:20 PM   #7
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sorry to double post, but if you have the cash to spend, i would recommend doing this. get all of the piping you need. youll probably need the headers, cat, and a muffler if you want to actually hear the rumble. you probably dont need a mid pipe but itd just be a plus to have one. and then take it to an exhaust shop in case they need to cut/weld the piping so it wont be hitting anything, for example, the tranny. probably looking at 1000 for the expensive route and like 350-550 the cheaper way. also, youll probably throw a check engine light for a p0420 which is the cat
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Old 07-25-2013, 01:47 PM   #8
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I meant the trannys in the way how it wraps around and connects to the cat but I realize theres nothing I can do about that but work around it obviously. (I was thinking the plastic cover for my tranny would come off and Id have more room to work with.

This is really a lot to take in cuz I know its probably never been done before with my exact exhaust setup. I will check in on outback exhausts like I should have looked them up in the first place. So what might fit are definately 2.5RS headers, a midpipe, and a 2.5RS cat since I have no clue where to even start with getting a single port cat
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Old 07-25-2013, 02:31 PM   #9
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Why are you doing this?
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Old 07-25-2013, 08:01 PM   #10
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Quote:
Originally Posted by xDubzx View Post
I meant the trannys in the way how it wraps around and connects to the cat but I realize theres nothing I can do about that but work around it obviously. (I was thinking the plastic cover for my tranny would come off and Id have more room to work with.

This is really a lot to take in cuz I know its probably never been done before with my exact exhaust setup. I will check in on outback exhausts like I should have looked them up in the first place. So what might fit are definately 2.5RS headers, a midpipe, and a 2.5RS cat since I have no clue where to even start with getting a single port cat
Hey xDubzx how good are your welding skills? bc on further inspection of your problem, I'm guessing wats in the way is the oil pan. If this is the case go out and buy 8 feet (2 4foot pieces) of same size and wall tube. (guessing its stainless) that way u can make a mistake and have more then cut the pipes, ( most might shun me for saying so ). Cut the left side at the primary collector so it's strait. cut the right side at the top of the bend (right above where the left side cut was suggested). then cut the secondary collector off so you could use it and the flange.

mock up the headers to the block, and bolt up the secondary collector to the mid pipe. Then grab your tubes and find where and what angles to cut. Then weld it up (tig is probly the smartest for stainless headers). Then guess what you have your very owe set of headers and you can brag you made.

Just one millwrights opinion tho I love doing that stuff.
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Old 07-26-2013, 09:29 AM   #11
Patrick Olsen
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Quote:
Originally Posted by xDubzx View Post
I meant the tranny[']s in the way how it wraps around and connects to the cat but I realize there[']s nothing I can do about that but work around it obviously. (I was thinking the plastic cover for my tranny would come off and Id have more room to work with.
I don't see a plastic cover in your pictures. That black part on the bottom of the transmission isn't a cover - that's the drain pan.

Quote:
Originally Posted by xDubzx View Post
This is really a lot to take in cuz I know its probably never been done before with my exact exhaust setup. I will check in on outback exhausts like I should have looked them up in the first place. So what might fit are definately 2.5RS headers, a midpipe, and a 2.5RS cat since I have no clue where to even start with getting a single port cat
Compare your car to something like this. It looks to me like the front of the mid-pipe is in roughly the same position on that car as it is on your car - it's probably 8 or 10" behind the transmission crossmember.

The DNA header you have is designed to bolt up to a stock 2.5RS/2.5i cat section, which you can see in this pic. Get a stock cat section, or an aftermarket replacement one, and I think you'll be good to go.

With all that said, I'm still not sure your heads have dual exhaust ports. As I said before, your header looks like the EZ30D header and PZEV header, which has a single, oval port. Can you remove the heat shields from the stock header to verify that you have two individual pipes joining the exhaust flange at the head?
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Old 07-26-2013, 10:57 PM   #12
xDubzx
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Ill try and look. Im guessing so but I will check. Also my welding skills are good but Im not going to that extent just for headers. This is a lot for me to take in honestly lol
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Old 07-27-2013, 01:12 AM   #13
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Another option is to cut off the collector of the header and connect the 2 pipes to the stock dual inlet cat. I can see why the exhaust shop wouldn't mess with it since they can't legally remove your cats.
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Old 07-27-2013, 01:19 AM   #14
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Quote:
Originally Posted by pauli133 View Post
Why are you doing this?
Seems obvious.....rumble
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Old 07-27-2013, 08:53 AM   #15
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You have a PZEV exhaust setup - looks like the H6 system but was used on 2.5l in 2004 and 2005.

Good luck - here are your non-custom options:
A. Install a complete 2005 normally aspirated non-PZEV exhaust on the car and use the UEL you bought.
B. Install a complete 2006 PZEV exhaust and use the second manifold you posted.

The bigger problem: Your car has (2) A/F sensors, (2) front O2 sensors and (1) rear O2 sensor. The ECM will not like the fact that if you switch to either set-up I described you will only have (1) A/F sensor and (1) rear O2 sensor.

You got lucky enough to buy the wrong model car to put a UEL on. Since this configuration was only used on a limited number of cars there does not seem to be a store bought option for what you want to do.
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Old 07-27-2013, 01:33 PM   #16
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Oh it will rumble. Same exact thing with my buddys car. The most difficult part is the flanges. My buddys 05 pzev legacy had oval ports on the heads similar to the h6.
Here's my post on legacygt.com about it. Second page last post. Can post a video so you can hear the tone. Its sounds pretty good.
http://legacygt.com/forums/showthrea...-208964p2.html
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Old 07-28-2013, 11:05 PM   #17
xDubzx
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Thats actually the person I talked to who showed me his OBX headers. I was just wondering if there was any possible way if I asked elsewhere
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Old 07-28-2013, 11:13 PM   #18
xDubzx
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Thank you reeg this is the best news about my headers that I received in months of planning to do it
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Old 08-01-2013, 02:29 PM   #19
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many n/a subaru's are not made for these exhaust, especially with a pipping of 2.25' or more
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