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Old 05-24-2002, 06:47 PM   #1
Godmal
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Member#: 4934
Join Date: Mar 2001
Chapter/Region: MWSOC
Location: LITH, IL
Vehicle:
2007 White STI LTD
Grey Mazda 5

Default For those w/ APS turbo-back exhaust systems

Anyone's cat go bad? Mine came apart internally, I was wondering if anyone else has experienced this.
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Old 05-25-2002, 12:09 AM   #2
Godmal
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Old 05-25-2002, 08:03 AM   #3
Ginseng
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2002 WRB WRX Sedan
2011 Sky Blue Forester Pr

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Hmm,

I take the silence to mean that no one else has had any symptoms that would lead them to remove the APS system to check for cat integrity. Perhaps a little more information from your side would help.

1. Was it coming apart when you received it?

2. How long did you have it on your car before you suspected it was a problem?

3. How did you come to realize it was coming apart internally? What were the clues? Sounds, bits of ceramic flying out your tailpipe, CEL?

4. Did you monitor any high EGTs?

5. How hard did you drive the car with the APS on?

6. Is it a metal or ceramic type catalyst?

I have some interest in this as well since the APS system is what I was planning to put on my rex.

Wilkey
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Old 05-25-2002, 02:36 PM   #4
Godmal
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When I got it, it was fine; I think I've had it on for 6 or 7 months. I started to notice a rattle a few months ago and noticed the exhaust was a litle louder. When I went to install my uppipe, I took the downpipe section off to find the cat material inside loose a rattling. I drive my like like its meant to be driven, enough said there.

I think the silence comes from that fact that many people do no have this exhaust on their cars, at least in the US. When I talked to Cobb about this, they said that they have not seen this happen really at all, so I'd like to think that maybe I just got a defective cat from the beginning, no big deal, I just need the new one. It really is a nice exhaust, the nicest I've seen IMO.

Erik
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Old 05-25-2002, 04:03 PM   #5
Somber
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Default 12000 plus miles on my Cobb/APS exhaust

no probs with cat or other... hope it was an rare "infant mortality" part you experienced...
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Old 05-25-2002, 09:44 PM   #6
Ginseng
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2011 Sky Blue Forester Pr

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So was it a ceramic cat?

I seem to recall the earlier APS design had a catless downpipe much like the Godspeed unit leading to a high flow cat in the front midpipe. I think I would have preferred this for performance but not emissions reasons. Also, this setup did would have had one less flange-gasket point to leak. I wonder why they didn't keep this design?

W
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