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cat question

 
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Old 06-26-2012, 11:05 PM
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cat question

hey guys, i got a 01 blue lude, its the third lude but first 5th gen, first two were 3rd gen. heres my questions im sure someone has tried it. i hear people talk bout high flow cats, what happens if u straight pipe it with o2 sensor still in after it? I really dont wanna flash the ecu yet, so if thats not a option does a high flow cat really flow much more than stock, and does it clean as good as stock as to not throw off the stock mapping? last question whats the reason for the second o2 i know im a bad person but f the enviroment thnxs in advance for the advise
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Old 06-27-2012, 04:45 PM
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Re: cat question

The second o2 sensor is used to monitor cat performance. Depending on what state you are in you will not pass smog with a highflow cat in certain states.
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Old 06-27-2012, 10:01 PM
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Re: cat question

yeah im in california so i know it wont pass. i always just bolted a new cat on before smog and take it off after on my 3rd gen.
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