High flow cat - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 05-19-2003, 10:53 AM   #1
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Default High flow cat

I want to get one, but I don't know what would work best on my car.

I'm looking for best performance with least amount of $$$
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Old 05-19-2003, 11:14 AM   #2
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Unlike mufflers, there really isn't a whole lotta difference between them. Some people just buy a larger stock cat from a larger car or truck. As long as it'* rated for 'higher flow' and has the same inlet and outlet sizes (I think you're 2.25", but measure it), you should do fine.
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Old 05-19-2003, 06:40 PM   #3
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Is there one brand out there that'* more reliable than others?
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Old 05-19-2003, 11:06 PM   #4
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I got mine on ebay for about 50 bucks. It'* a catco convertor, but the flow is much better than the OEM convertor.
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Old 05-20-2003, 02:02 AM   #5
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Autosound for me. Same price more or less, but purchased locally. Even magnaflow sells a cat, but you pay for the name on it.
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Old 05-20-2003, 07:50 AM   #6
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All right, I'll check out both of those.

How is the installation with those?
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Old 05-20-2003, 05:36 PM   #7
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You might have to remove the O2 sensor, and i think its just taking a cutting torch to the pipe and then using a MIG welder to put the new one on. At least thats how it works on a muffler...
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Old 05-20-2003, 05:38 PM   #8
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I dont even think some have to be welded, it seems they are made to bolt on for easier removal, but not sure...
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Old 05-20-2003, 05:43 PM   #9
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welding would give you that airtight seal with no excess noise though...
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Old 05-20-2003, 08:11 PM   #10
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Look on www.summitracing.com at catco catalytic convertors. like egladman said they are 50 bucks for a universal fit one. Thats what I'm getting...but it'* a dream for now! I'm as broke as a stepped on cracker!
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