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Old 10-23-2019, 06:01 PM   #1
psc77
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Member#: 497306
Join Date: Feb 2019
Location: vancover canada
Vehicle:
2009 sti hatch
dark grey

Default downpipe cat lifespan

what is the lifespan of a cobb catted downpipe?
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Old 10-25-2019, 11:12 AM   #2
shadowsports
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Member#: 446364
Join Date: May 2016
Chapter/Region: BAIC
Location: Nor Cal
Vehicle:
'17 STI LMT '08 LGT
DGM / QSM

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Quote:
Originally Posted by psc77 View Post
what is the lifespan of a cobb catted downpipe?
That could vary based on mods, tuning and how the car is used. I'd inspect it at 5 yrs. You might need a borescope to do this. Will likely last much longer, but it won't hurt to have a look.
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Old 10-25-2019, 12:09 PM   #3
psc77
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dark grey

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the used pipe I have looks good.
the inners of the cat are in tack and the pipe is solid just tarnished from use unknown miles. can I wash any soot from the cat and pipe with something?
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Old 10-28-2019, 10:25 AM   #4
shadowsports
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Location: Nor Cal
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'17 STI LMT '08 LGT
DGM / QSM

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Quote:
Originally Posted by psc77 View Post
the used pipe I have looks good.
the inners of the cat are in tack and the pipe is solid just tarnished from use unknown miles. can I wash any soot from the cat and pipe with something?
You can buy catalytic converter cleaner from any autoparts store. I would just use a few cans of SeaFoam in 1~3 tanks of gas over the course of a month.
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Old 10-28-2019, 05:29 PM   #5
Zebuling
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Location: New Jersey
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2005 Subaru STI
WRB

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So from my recent experiences with catted downpipes. I live in NJ so you need a Cat to pass inspection, unless you just buy a sticker off a dealership. I ran a Invidia Catted DP on a Cobb 20g on my 05 STI. The cat probably lasted about 6 months which was what i expected, even though it was blown out and straight pipe, still passed inspection. Hope it helps
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Old 11-05-2019, 10:42 AM   #6
Titanicflea
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2006 Forester
Champagne

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I have always heard it depends on how the engine is tuned. Some can last for 5- 7 some as little as 6 months. Im pretty new to owning Subaru, so Its just a shot, but Id say expect anywhere between 3 to 5 years if you are running stock as a daily driver. If you have aftermarket parts or dog the piss out of it, maybe a little lower. However you can always check it out intermittently to see if it needs to be replaced.
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