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Old 05-03-2006, 05:36 PM   #1
SyntheticDefect
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Join Date: Feb 2006
Chapter/Region: W. Canada
Location: Calgary, Alberta. Canada
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2005 Impreza RS
Red

Default OBX EL header

Has anyone put the OBX EL header pipes on their 2005 RS's yet, if so how did you like it and what did you do so you didn't get a check engine light?
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Old 05-03-2006, 08:43 PM   #2
fenix_black
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Old 05-03-2006, 08:48 PM   #3
SyntheticDefect
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Ya i know how to use the search button, but thanks anyways. I cant find anything about anyone putting them on the 2005s. Thats why i posted that.
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Old 05-03-2006, 09:21 PM   #4
BlkTS02
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From an exhaust perspective the 05 is the same as every other 99-04 N/A impreza.
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Old 05-03-2006, 10:29 PM   #5
SyntheticDefect
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Well i ordered mine from ebay, hopefully there are no fitment issues or any kind of issues for that matter
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Old 05-04-2006, 12:15 AM   #6
ArcAnGeL
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synthetic let me know how is goes... and more details... im looking for headers, and a catless mid pipe
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Old 05-04-2006, 12:17 AM   #7
JonzFaSTi
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if you go to rs2.5 they talk a lot about the obx.
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Old 05-04-2006, 12:19 AM   #8
ArcAnGeL
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is that a website?
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Old 05-04-2006, 12:29 AM   #9
gtwagon941
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Quote:
Originally Posted by ArcAnGeL
is that a website?
Yep!

www.rs25.com
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Old 05-04-2006, 10:32 AM   #10
SyntheticDefect
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Old 05-04-2006, 10:46 AM   #11
SyntheticDefect
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should work nice with my custom cat back exhaust, i used 2 1/4" piping, removed the resonator, used Flo-Pro stainless exhaust with 4" stainless tip. Sounds nice, hopefully it wont go to much louder with the equal length headers



Also got the Injen Intake



After the header pipes i will get the Perrin light weight crank pulley and then suspension
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Old 05-04-2006, 02:53 PM   #12
BlkTS02
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Quote:
Originally Posted by SyntheticDefect

Not to burst your bubble, but you wasted $30 on that 02 sensor extension.

Search under "mechanical CEL fix" if you'd like to find out why.
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Old 05-04-2006, 03:39 PM   #13
SyntheticDefect
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Oh well, not much i ca do now. Just hope that it works. Besides 30$ isn't that much.
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Old 05-04-2006, 03:39 PM   #14
bahboy20
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PSM

Default obx header

hey, you are doing what I have been thinking of.

Why did you get that injen intake and not the newer one with the big hp gains that dips into the fender well??? yours looks just like it just sucks air from the hot engine bay?

I have a 2002 2.5 RS with a injen intake and greddy evo2 exhaust. I have been debating getting the obx EL header, mainly because it seems to be a pain to get a HFC and get that welded in. The auction only includes a catless straight pipe.

I heard that the sound will be terrible with equal length header. You will no longer have the boxer rumble, and the car will sound like a bumble bee, a-la honda civics, etc.

Can you pass emissions if you have a CEL fix but no cat at all, and just use the EL header and catless straight pipe they include?

Also, I hear that you have to either drill or remove your heatsheild because the sensor is on the wrong side for one of the 2 sensors on the header....not sure if that effects your year, but its not that big a deal, just thought maybe you would want to know that...

dan
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Old 05-04-2006, 10:42 PM   #15
moogoob
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Quote:
Originally Posted by BlkTS02
Not to burst your bubble, but you wasted $30 on that 02 sensor extension.

Search under "mechanical CEL fix" if you'd like to find out why.
I have the nonfouler fix on my car. While its been working out with two of the smaller ones.... they get pretty rust real fast. single stainkless version would have been nice... but hey, whats $3.
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Old 05-04-2006, 02:17 PM   #16
ArcAnGeL
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sounds like exactly what i wanna do..

also check out http://www.rallitek.com/yhst-4918738...5/rapeecu.html

this would be a great addition!@
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Old 05-04-2006, 02:40 PM   #17
SyntheticDefect
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ya, i want one of those too
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Old 05-04-2006, 04:03 PM   #18
Rally_wgn
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Actually the sound of the EL header is more along the lines of a Porsche motor than a Honduh. There are a couple of threads on the EL header sounds on RS25.com. Maybe some here too.
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Old 05-04-2006, 04:45 PM   #19
BlkTS02
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Your muffer / cat / resonator has more of an effect on exhaust sound / tone than a header does.

Although yes, the El header almost eliminates the boxer rumble.
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Old 05-04-2006, 05:12 PM   #20
SyntheticDefect
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I'm not worried much about the sound ( honda, porsche, subby ), i just dont want it to be ridiculously loud and annoying. Im only looking for hp and torque gains, mainly torque. just want to get more pull from the start. And i didn't run my Injen intake cold air because i heard somewhere you lose low end torque. Also its a pain to get to the filter when it comes time to clean it. I have the extension to run it cold air just don't want to.
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Old 05-04-2006, 05:15 PM   #21
SyntheticDefect
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Also i know about the o2 sensor bung being located in the wron place. doesn't bother me. i might get the resonator taken out and get a high flow cat welded in its place instead i think, we'll see.
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Old 05-04-2006, 07:09 PM   #22
jimbobrand
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In order to use the O2 extender you will need to have the rear O2 bung relocated as the sensor is very close to the driveshaft as is. Once you get the header installed you may want to add a resonator back into the system to mellow out the sound and make it quieter.
-Jim
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Old 05-04-2006, 08:24 PM   #23
SyntheticDefect
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Im running the car without a resonator now and i like the way it sounds, and as i mentioned before i plan on adding a high flow cat back into the system so that should relocate the o2 sensor bung. And i read somewhere that the equal length headers quite the system a little bit, not sure how true that is but we'll see. Do you have an OBX header on your car and if you do do you like it?
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Old 05-05-2006, 09:15 AM   #24
wrx1986
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Quote:
Originally Posted by jimbobrand
In order to use the O2 extender you will need to have the rear O2 bung relocated as the sensor is very close to the driveshaft as is. Once you get the header installed you may want to add a resonator back into the system to mellow out the sound and make it quieter.
-Jim
DAMN!
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Old 05-04-2006, 09:10 PM   #25
BlkTS02
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Are you still running the stock cat section? That really quiets the exhaust down.

Once you get the OBX installed you'll understand.
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