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      07-23-2010, 08:50 PM   #25
Tochenzo
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Drives: 2009 135i
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Location: VA

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I don't think there is an o2 sensor "fix" on the catted DPs since the o2 sensors should be functional and working since they are plugged into the cats.

What is the difference between these cats and the ones CP-E offers on their catted 3" DP's? I'm in the market and am trying to decide which way to go, I trust both AR Design and CP-E as I have used their products before, but I haven't seen anyone post results or reviews on either of their Catted DP's.
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