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Old 05-17-2001, 08:16 AM   #1
joostin420
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Member#: 1046
Join Date: Mar 2000
Location: New England, United States
Vehicle:
2007 WRX Wagon
UGM

Question exhausts: Turbo back -vs- Cat back, pics would be nice of....

gathering info. on both types of systems and the benefits and downsides of each.

i am trying to make my decision, but this is getting complicated.

questions:

1. cat-back: is just the midpipe and muffler, this can be a universal muffler with a custom made mid-pipe and that is it correct? this is the setup i put on my RS.

2. turbo-back: is the down-pipe from turbo, midpipe and muffler. what is involved with this, the o2 sensors have to be removed from stock down-pipe i assume and replaced in the new down-pipe correct?

3. how much more of a benefit would you get if you replaced the however many cats with a single high-flow cat, and would this have you fail an emssions test?

4. can you get a cat-back system and then purchase the down-pipe separately? because you could get a mid-pipe made for $120 and a muffler for $100-200. this is much cheaper than $1000 for full turbo-back. is a
down-pipe really $700?

5. does a full turbo-back exhaust throw check engine lights regularly, because i would like Maintenance free if possible?

6. is there anything else needed when you have a turbo-back exhaust besides a high flow air-filter?

thanx,

justin
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Old 05-17-2001, 08:57 AM   #2
Frank
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theres no point in just getting a cat back system (performance wise). The cats are what kills the power so even if you got a 5 in back box you'd still have massive restrictions on the turbo side. Maybe get a back box that is part of a turbo back system and get it piece by piece but unless all you want is sound don't get the cat back.
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Old 05-17-2001, 10:17 AM   #3
joostin420
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Location: New England, United States
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2007 WRX Wagon
UGM

Question

so, what if i got a 3" cat-back and replaced the 2 cats (right?) with one high flow cat?

are there any sensors to worry about that are in the cat or anything?

thanx,

justin
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Old 05-17-2001, 11:44 AM   #4
GTBGUY
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'98 QS Legacy L (auto)

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joostin420 - Here are some answers to your Q's :

Turbo back systems provide more power then just a cat-back on the WRX. For example, the Brullen systems are a full mandrel 3" ID T304 Stainless steel. So one big thing with getting one made yourself, for 3" systems will most likely be crush bent (which restricts flow). As well, the version 1 systems come with a 2-piece downpipe which are offered with a 3" hi-flow cat and option test pipe can be purchased for track use.

If you're going for just some cheap mild steel or aluminized piping, crush bends, and el-chepo muffler, it'll definately be cheap... as the saying goes "you get what you pay for".

I hope that helps.
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Old 05-18-2001, 01:21 PM   #5
thebusiness999
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Yellow Rex, I still am waiting for my WRX, so I can't give you firsthand experience, but people seem to be completely satisfied with BPM exhaust systems. They run for about $1000 and there always seems to be a GB going on in the Vendors Section.

Paul

[This message has been edited by thebusiness999 (edited May 18, 2001).]
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Old 05-18-2001, 01:44 PM   #6
joostin420
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2007 WRX Wagon
UGM

Question

can you buy a down pipe separately?

thanx,

justin
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Old 05-18-2001, 06:50 PM   #7
GDA
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02 GDA
Platinum

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I have a post with pics of the BPM twin tip system, check it out. There is no pick of mid/downpipe. Check back tommorrow night as the pics of it on the car will be up.

BPM or bust!
http://www.i-club.com/ubb-files/Foru...ML/000794.html

EJ20WRX

[This message has been edited by EJ20WRX (edited May 18, 2001).]
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Old 05-19-2001, 12:13 AM   #8
joostin420
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2007 WRX Wagon
UGM

Smile

still need answers to my questions please.

thank u,

justin
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Old 05-19-2001, 12:19 AM   #9
Yellow Rex
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Location: Atlanta, GA, USA
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2002 IMPREZA WRX
BLAZE YELLOW

Talking

I just got my '02 WRX, I would like to ypgrade the exhaust and intake. I've done lots of mods to my other cars before so I know the pit falls (turbos and superchargers plus exhausts, suspensions, etc to 2 Miatas and 1 GSR).
Anyway, I want a non-restrictive exhaust and intake but I want well made, quality stuff that will fit well and produce power. I'll appreciate any concrete suggestions, including the brand name, where to get them, etc.

Thanks in Advance,

Manuel
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