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Old Dec 27, 2006 | 12:10 PM
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How many does a 98 C5 have from the factory? 2 or 4? Thinking about running catless....
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Old Dec 27, 2006 | 01:39 PM
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2 pup cats right after the exhaust manifold and 2 more upstream of the mufflers. = 4 Cats for you my friend.

If you install LT headers that will elim the pups. Going with high flow cats instead of eliminating the main cats will get you more RWHP without the stink of going catless.
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Old Dec 27, 2006 | 01:44 PM
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Another thing to consider is there will also be an increase in exhaust sound, which I don't know if you consider a good or a bad thing. But it should sound bad a$$.
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Old Dec 27, 2006 | 01:55 PM
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Originally Posted by ElectronBlueC3
How many does a 98 C5 have from the factory? 2 or 4? Thinking about running catless....
I think there are only two cats on all C5's until late 2000.

They are in the tunnel, approximately under the seats.

However, in my experiece, running catless will add negligable power and be smelly..
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Old Dec 27, 2006 | 03:30 PM
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Originally Posted by C_Williams
I think there are only two cats on all C5's until late 2000.

They are in the tunnel, approximately under the seats.

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Old Dec 27, 2006 | 05:01 PM
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Originally Posted by C_Williams
I think there are only two cats on all C5's until late 2000.

They are in the tunnel, approximately under the seats.

However, in my experiece, running catless will add negligable power and be smelly..


97-00 = 2 .. 01+ = 4 cats.


however i disagree about the comment on the removal .. it makes the car a whole lot louder though.
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