Quote:
Originally Posted by A PUNK
Not at all! It just means that you are pushing out more emissions than the gov't and environmentalist want you to. Having a bigger exhaust will always push more CO2 and H2O out than if you had stock. Also Cat deletes will trip up there system hardcore and fail you. I don't have to worry about this because I live in MN. So I have 0 Cats on mine. lol.
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Actually it could also indicate the engine isn't running optimally. If your high on HC could be too rich if your high on CO too lean.. same goes for nox.