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Old 02-02-2008, 03:41 PM   #1
nization
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Member#: 159023
Join Date: Sep 2007
Chapter/Region: MWSOC
Location: Ohio
Vehicle:
1997 Impreza Outback
Green

Default fuel economy

I'm having a real hard time finding exhaust systems for my car. I recently got rear-ended and the exhaust just broke off at the factory header/collector. I figured I'll take this opportunity to replace that with a better system, disregarding the cats if possible.

I have a 1997 Impreza Outback Sport with n/a 2.2L engine. I am pretty sure it's not the most common car to buy real performing parts for, but I think I want a quality equal length header and preferably remove the cats if I can confirm that will actually increase my fuel economy. Problem is, I haven't even found any sources for these pieces. Lots of cat-back systems, but that's not what I'm concerned with right now.

Any help/suggestions?

Thanks
Miles
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Old 02-02-2008, 04:02 PM   #2
MotoFoxKDX1
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Well I'm not sure about the fuel economy with running no cats but recently I've done some work to my car which is a 2001 Outback Sport. Your not really going to find any parts that will be listed for just the OBS so look for parts for the 2.5RS in your year's range, later year's might fit as well but I don't know that for sure.

I recently just put on a cat-back exhaust the was for a 98-01 2.5RS and it fit fine. Only thing you will have to check for is the header's and see if they are dual port or single, I'm going to assume your's are single as that's what mine are and if that's the case you might have some difficulty tracking down a set of header's cause I know I am.
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Old 02-02-2008, 06:16 PM   #3
piker28
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all depends on a couple things really. First what is your travel mostly? If it was all highway and no traffic id prob help a tad but the second you do stop and go it will sink. Also if you have the dreaded CEL on from catless than your car will be running richer than normal and well no bueno
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Old 02-02-2008, 08:12 PM   #4
nization
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1997 Impreza Outback
Green

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From what I've read, it sounds like I have the dual port as mine is a '97. I'm not specifically looking for OBS parts, but the hard part is 2.2L headers. I've seen most are for the 1.8 or the 2.5 and will fit the '95 model 2.2L...

I travel all day for work. some days it's 50/50 city/highway, and other days it's 20/80 city/highway. So most of the time, I am traveling on the highway, but not always, of course.

That's another thing I implied about on another forum, if there's a way to reprogram the ECU so that the CEL does not come on or anything. Ideally, I want to make the ECU happy with the catless system. Not that I want to destroy the enviornment, but they are 11 years old now and cats are known restrictions (at least, from everything I understand about them) and when they get old and fail they can cause stop up the exhaust even more so.
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Old 02-02-2008, 08:17 PM   #5
piker28
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to me it sounds like headers, stock cats and a catback would be the best route
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Old 02-02-2008, 08:49 PM   #6
SilverSubie2.5
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Quote:
Originally Posted by nization View Post
From what I've read, it sounds like I have the dual port as mine is a '97. I'm not specifically looking for OBS parts, but the hard part is 2.2L headers. I've seen most are for the 1.8 or the 2.5 and will fit the '95 model 2.2L...

I travel all day for work. some days it's 50/50 city/highway, and other days it's 20/80 city/highway. So most of the time, I am traveling on the highway, but not always, of course.

That's another thing I implied about on another forum, if there's a way to reprogram the ECU so that the CEL does not come on or anything. Ideally, I want to make the ECU happy with the catless system. Not that I want to destroy the enviornment, but they are 11 years old now and cats are known restrictions (at least, from everything I understand about them) and when they get old and fail they can cause stop up the exhaust even more so.
1) Just go check if they are dual or single port. I don't know for sure as I don't have a '97 Outback, but you can very easily tell by looking yourself.

2) As far as I know, there are no reflashes available that can get rid of the P0420, and since you can't be OpenSource tuned, that option is out as well. The only way you will be able to get rid of the P0420 is with the spark plug anti-foulers to back the O2 sensor out of the exhaust stream.
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