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Old 05-13-2008, 11:12 AM   #1
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Aftermarket catalytic converter question?

Hi All,

Wondering if the learned members of this forum would mind sharing opinions on who produces the best aftermarket catalytic converter? Who has the best prices? I need one (non-'California') for my '00 TJ Sport. Any suggestions? Thanks in advance!

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Old 05-13-2008, 11:44 AM   #2
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I bought mine from http://www.car-sound.com/ and had very good results. Their prices were far cheaper than anywhere else I could find. Just make sure if your existing cat has the 02 sensor screwed into it that the replacement cat has the requird 02 sensor mounting bung in it. Most cars sold are 50-state legal so most have the 02 sensor in the cat so that bung is required. The first cat I received didn't have the required bung so I had to return it and get one that did.

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Old 05-13-2008, 11:56 AM   #3
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Random Technology has high flow, stainless steel, direct fit "cats" with the 02 sensor bung...bit pricey though.
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Old 05-13-2008, 12:10 PM   #4
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One thing about cats and "high flow" cats... cats are not very restrictive when compared to mufflers and as such, high flow cats don't really do much, if anything, for performance.
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Old 05-13-2008, 12:19 PM   #5
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Jerrys right. Most stock cats can flow far more cfm then the engine can produce as long as it is N/A. No need to waste extra money to get a high flow cat.
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Old 05-13-2008, 04:30 PM   #6
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I went with the Random Tech. converter because of the SS construction. Previous owner did some wave running I think because the whole exhaust system was rusted out. I replaced the whole system, header and all with steel-except the Y-pipe. I did "believe the hype" about high flow...it didn't make a difference. Wish I'd met you guys sooner.
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Old 05-13-2008, 09:18 PM   #7
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If you get a regular cat without the bung mounted in it, you can weld a bung into the pipe right after the cat. Its what I did and have had no problems or check engine lights. The bung is like a couple bucks vs. having to pay for a pricey cat with a built in bung. JEGS.COM is very inexpensive and they have free 1-2 day nationwide shipping. Haven't found anywhere that beats that. Just get a universal cat.
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Old 05-15-2008, 02:12 PM   #8
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Hey Guys,

Thanks for all the input! ~

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