Quote:
Originally Posted by edub370
i have test pipes on my car and have not seen a check engine light yet. i didn't put them on so idk which brand they are, but are there certain brands or styles that will throw codes and certain ones that wont?
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In general, the longer the O2 extender is, the less likely it is to throw the fault/light (the O2 has a longer path to travel to the sensor). I don't think it is really brand specific as much as the design/length of the extender that the O2 sensor plugs into. Really, if you are running test pipes or LTH, you should get a tune. As mentioned, UpRev (and Cobb) will allow you to turn this fault off altogether, and you will be able to take full advantage of the increased breathing.