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Old 08-01-2011, 07:09 PM   #1
BIG_SEXY
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2nd CAT ?

I had my 2.5" Trubendz SS exhaust installed today, and after the shop was done I figure I'd stop by the recycling place and see what extra change I could get out of the 2nd CAT. They told me that it wasn't a cat, but was more less a resonator. Anyone have any info on this?


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Old 08-01-2011, 07:12 PM   #2
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Isn't the standard setup on most cars these days only one cat and a resonator to help quieten the factory exhaust? I know the last two cars i have owned were set up this same way.
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Old 08-01-2011, 07:14 PM   #3
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Quote:
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Isn't the standard setup on most cars these days only one cat and a resonator to help quieten the factory exhaust? I know the last two cars i have owned were set up this same way.
I always thought the "lunch box" toward the end of the stock exhaust would be the resonator?
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Old 08-01-2011, 08:45 PM   #4
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Quote:
Originally Posted by BIG_SEXY View Post
I always thought the "lunch box" toward the end of the stock exhaust would be the resonator?
It is. The muffler is before that and before that is the 2nd cat.
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Old 08-01-2011, 08:54 PM   #5
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The reason the 2008-2011 have a little more horsepower is becaue they have 1 cat that is being supervised wth an oxygen sensor, with the resonator and the muffler "lunch box delete, the 2005-2007 have 2 cats and one isn't being monitored, it has a resanator and the muffler, that's what I read in. Thread about 2 months ago. Some one correct me if I'm wrong
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Old 08-01-2011, 09:03 PM   #6
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Originally Posted by bespurcell View Post
It is. The muffler is before that and before that is the 2nd cat.
I wonder why they would tell me it was a resonator?
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Old 08-01-2011, 09:34 PM   #7
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I just saw you had a 2009. It might be a resonator. I was giving a description for the 05-07.
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Old 08-02-2011, 03:00 PM   #8
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the first thing in the exhaust is the cat. the second bout halfway down is the res the final piece is the muffler for us foci its the lunchbox muffler. the muffler is always the last piece in the exhaust assembly. so to answer the question the "2nd cat" would be your res. the big cylindrical thing.
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Old 08-02-2011, 03:49 PM   #9
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^^that depends on model...the 05-07 ST and the Saleen Foci had two cats. The primary in the manifold and the second one in the place where a resonator would go. The easy way to tell look inside of it with a flash light if it has honeycomb in it its a cat.
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Old 08-02-2011, 03:58 PM   #10
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To answer your question about what a cats worth, I got over $100 for the stock off my SVT, But prices start around $30 and can go over $200 for the right cat from the right guy.
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