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Old 11-16-2006, 08:02 PM   #1
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high flow cats

would they set off a CEL on?
what are some good brands?

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Old 11-16-2006, 08:49 PM   #2
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Dansk has a set for the low low price of $1350.00 or so. For that price, they better not set off a CE light. If anyone has found quality sport cats for less, please post it here!
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Old 11-16-2006, 09:02 PM   #3
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damn thats a lot of gas money
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Old 11-17-2006, 04:14 AM   #4
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Why not just get cat bypass pipes? 2000+ models have 4 cats (2 precats at the headers and 2 more before the muffler), so if you put in the bypass pipes, you won't get a CEL cause you still have 2 cats up front. Bypass pipes cost btw. $400-500.
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Old 11-17-2006, 05:57 AM   #5
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I have been having a little trouble with CEL (1275 and 0133) with the high-flow cats I have been using, but I think that is because they are used. It looks like one of the units is bad and we plan on replacing it. If you have a good quality high-flow cat and the O2 sensors are placed properly, should be no problem.

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Old 11-17-2006, 08:17 AM   #6
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my car is a 98, so i dont have 4 cats.

also, y are bypass pipes so expencive, when i had a ls1 camaro i went to a local muffler shop, they cut the cats off, and velded a pipe in there, and gave me my cats in a box. cost me 45 dollars
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Old 11-17-2006, 08:35 AM   #7
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Quote:
Originally Posted by djomlas
my car is a 98, so i dont have 4 cats.

also, y are bypass pipes so expencive, when i had a ls1 camaro i went to a local muffler shop, they cut the cats off, and velded a pipe in there, and gave me my cats in a box. cost me 45 dollars
Because they are for a Porsche. You don't think any shop would sell stuff they make for a Porsche for a bargain do ya?
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Old 11-17-2006, 08:44 AM   #8
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good point, but its just a piece of pipe. doesnt have anything to do with porsche or chevy or lexus or whathave you
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Old 11-17-2006, 08:50 AM   #9
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Quote:
Originally Posted by djomlas
good point, but its just a piece of pipe. doesnt have anything to do with porsche or chevy or lexus or whathave you
Same concept as cold air intakes, for example. Materials these shops use are the same (a cone filter, plastic intake tubing/box, etc.). Sell it for a Chevy and charge $99 bucks. Sell it for a Porsche, and charge $400. They think Porsche owners expect to pay more and can afford to shell out more. Marketing. Clever marketing.
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Old 11-17-2006, 09:06 AM   #10
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i know exactly what ure talking about very sad, unethical, but profitable
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Old 11-17-2006, 10:32 AM   #11
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Cat bypass will get you more results (headers even more) and shouldn't affect the CEL at all. We've got cat bypass for $495 - http://www.epiqautosport.com/pro_boxster_secondary_catalytic_bypass_pipes.php - and then you still have your primary cats.
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Old 11-17-2006, 02:08 PM   #12
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as stated above, i dont have 4 cats, so that wont help me at all

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