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Old 12-28-2005, 11:09 PM   #1
LunaticDriver
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Default will a custom cat-back off a 04 RS fit an 01 RS?

Title says it all baby!
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Old 12-29-2005, 10:32 AM   #2
bongchild
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Not without modification.
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Old 12-29-2005, 12:56 PM   #3
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Quote:
Originally Posted by bongchild
Not without modification.
Useless reply.

Here's something useful:

Yes.

However, you'll have to have one hanger changed, the one right before the muffler. Though if you use hardened hangers like KartBoy or Cobb, that hanger isn't even necessary.
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Old 12-29-2005, 01:53 PM   #4
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Quote:
Originally Posted by FalconRS

Useless reply.
Useless how? I answered the question that was presented, sans superfluous install advice.
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Old 12-29-2005, 02:05 PM   #5
4wdrift
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IIRC, you will also have to have the flange at the cat rotated. All less than $25 at a muffler shop.
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Old 12-29-2005, 05:09 PM   #6
Caplin 2.5
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Quote:
Originally Posted by 4wdrift
IIRC, you will also have to have the flange at the cat rotated. All less than $25 at a muffler shop.
Why would the flanges at the cat be different? I was under the impression that all RS's had the same angle flange.
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Old 12-29-2005, 05:14 PM   #7
drmichael
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yes the flanges are the same as i heard, only one hanger needs to be changed
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Old 12-29-2005, 06:30 PM   #8
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The flanges and lengths are identical. You only have to mod the front muffler hanger and it's easily done with just a bolt and collar through the existing mount on the body. Like this:

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Old 12-29-2005, 08:48 PM   #9
Natoe
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yeah charlie's 05 sti catback with an ebay DP fit on my 95 impreza great except one hanger that i didnt bother with because the rest are there.
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Old 12-29-2005, 09:06 PM   #10
99subi
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just buy my apexi N1 for the 97-01 impreza to ensure a perfect fit ! pm if ur interested
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Old 12-30-2005, 04:06 AM   #11
FalconRS
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Quote:
Originally Posted by 99subi
just buy my apexi N1 for the 97-01 impreza to ensure a perfect fit ! pm if ur interested
Though the one hanger will still need some modification to fit, as I posted above.
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Old 12-30-2005, 06:11 PM   #12
4wdrift
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Quote:
Originally Posted by Caplin 2.5
Why would the flanges at the cat be different? I was under the impression that all RS's had the same angle flange.
I think I misread. I got a rediculous deal on a Ti. catback from DP Sports. Everything was perfect accept for the flange that needing to be rotating. With a little digging, I found out that the cat back was for a WRX. I was told that the turbo was the difference. Everything lined up properly though, just had to rotate the flange.

cheers
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Old 12-30-2005, 11:14 PM   #13
Caplin 2.5
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Quote:
Originally Posted by 4wdrift
I think I misread. I got a rediculous deal on a Ti. catback from DP Sports. Everything was perfect accept for the flange that needing to be rotating. With a little digging, I found out that the cat back was for a WRX. I was told that the turbo was the difference. Everything lined up properly though, just had to rotate the flange.

cheers

yup that sounds about right. Was it a 3inch exhaust? thats kinda big for a NA isn't it?
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Old 01-11-2006, 07:12 PM   #14
4wdrift
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Quote:
Originally Posted by Caplin 2.5
yup that sounds about right. Was it a 3inch exhaust? thats kinda big for a NA isn't it?
bingo...
Future engine upgrade in the works though. I have to finish all the other upgrades I have laying around. One thing at a time.
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Old 01-11-2006, 08:52 PM   #15
live-
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Is that all that needs to be done to fit a stock WRX or STi catback onto my RS? Just rotate the flange or is the flange also too big on it?
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