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Old 08-29-2010, 03:19 PM
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Default Hi-Flow Cats
i was curious about getting hi0flow cats. i have an 07 xlt 5.4. in addition i have true dual exhaust (x-pipe). is it worth getting them as far as sound and performance?
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Old 08-29-2010, 03:35 PM
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I asked this question as well, and was told by multiple people we already have high flow cats.
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Old 08-29-2010, 10:38 PM
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Exclamation High flow cats
Originally Posted by AllxBlackedxOut
i was curious about getting hi0flow cats. i have an 07 xlt 5.4. in addition i have true dual exhaust (x-pipe). is it worth getting them as far as sound and performance?
I have sent this link before. If your stock ones are bad, maybe change them.
But if it ain't broke, don't fix it.
http://www.fordf150.net/forums/viewtopic.php?t=60187
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Old 08-29-2010, 10:41 PM
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Who needs cats
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Old 08-29-2010, 10:53 PM
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Everyone. You dont want to screw up your O2 sensors.
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Old 08-30-2010, 03:27 PM
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Originally Posted by Fsufan09
I asked this question as well, and was told by multiple people we already have high flow cats.
do we really? i just wanna make my truck louder and i dont feel like dropping a grand on headers and i wanna keep it legal
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Old 08-30-2010, 03:36 PM
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Originally Posted by Fsufan09
Everyone. You dont want to screw up your O2 sensors.
care to elaborate?
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Old 08-30-2010, 03:36 PM
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I have em on my 4.6L. Big time sound difference over the stock ones. I think the newer years have 2 cats while mine had four. 2 in the front and 2 in the back. I removed them all and put 2 magnaflows on. Cost me $180 installed.
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Old 08-30-2010, 03:59 PM
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Originally Posted by Fsufan09
Everyone. You dont want to screw up your O2 sensors.
There are ways around that
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Old 08-30-2010, 04:03 PM
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Originally Posted by Fsufan09
Everyone. You dont want to screw up your O2 sensors.

i deleted my two rear cats and didnt even throw a code. and if you throw a code there is an easy fix to trick the 02 sensor. so how can you screw them up?
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