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Removing catalytic converter

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Old Jun 3, 2009 | 11:40 PM
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Default Removing catalytic converter

Just wondering if you remove the catalytic converters if it makes your exhaust louder or if it reduces performance any? I have the borla stingers on it right now.
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Old Jun 3, 2009 | 11:41 PM
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you're about to catch a **** storm from the tree huggers and fools who buy into the whole global warming scam.
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Old Jun 3, 2009 | 11:43 PM
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Yes, makes it louder, and will increase higher RPM performance.


And I am outta here before the invasion of the treehuggers....

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Old Jun 3, 2009 | 11:55 PM
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Ha ha yeah well I'm sure most tree huggers aren't driving around town in vettes. But will it make it a lot louder? I don't want it sound bad.
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Old Jun 4, 2009 | 12:22 AM
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Originally Posted by osucowboys83
Ha ha yeah well I'm sure most tree huggers aren't driving around town in vettes. But will it make it a lot louder? I don't want it sound bad.
It doesn't make it a lot louder, but it does make it somewhat louder.
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Old Jun 4, 2009 | 07:41 AM
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Get these if you want loud:



Borla straight pipes. If you shop around you can find them for like $320 - $380, get the Xpipe for a couple more bills, and have it installed for 60 bucks. VERY nice and loud if you want to be but still quiet at rpm's under 2000
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Old Jun 4, 2009 | 10:13 AM
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Never tried removing the converters, but I would think that taking it out of the system would cause the exhaust to be louder.
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Old Jun 4, 2009 | 11:36 AM
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I think you'll find larger problems with engine performance in respect to the O2 sensors and what'll happen to your fuel mixture. Got to remember that these cars were designed to run with the cats in mind.
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Old Jun 6, 2009 | 12:38 PM
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more power and louder, and a little rotten egg smell to go along with it.

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Old Jun 6, 2009 | 12:44 PM
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Alot louder, and a little funny sounding if you don't have headers. I replaced my cats with straight pipes in their place a few months ago. I have electric cutouts and they sound okay with the cutouts open. Very loud. Would sound alot better with headers.

Through the exhaust with the cutouts closed, it did not make much difference. It is a little bit louder, but not a huge difference. You will have to get a tune to get the computer back right and also to program out the rear 02 sensors. Without this being done you will get a service engine light. The rear 02's are only there to check and see whether or not the cats are working correctly. The front 02's tell the computer to adjust.
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Old Jun 6, 2009 | 02:52 PM
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Headers and hi-flo cats will wake up the stingers
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Old Jun 6, 2009 | 07:38 PM
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thats for sure
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Old Jun 7, 2009 | 02:23 AM
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You will smell gas, and only gain five, or so ponies!
Obvousily you wont pass emissions either.
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Old Jun 7, 2009 | 02:59 AM
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Originally Posted by dgrant3830
I think you'll find larger problems with engine performance in respect to the O2 sensors and what'll happen to your fuel mixture. Got to remember that these cars were designed to run with the cats in mind.
I agree...
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