Originally Posted by TrueStreetTim
To a degree.....yes. If there is anything in common, maintenance wise, is I get calls about O2 codes. Typically with replaced headers, yes. But also those without. But keep in mind, no cats will kill them especially fast by comparison.
If you decide to change your sensors out, make sure they are OEM straight from Ford (not Bosh etc.) Tuning has shown us that the aftermarket sensors heat up and cool down just differently enough than OEM to possibly throw codes.
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Knowing it would leave some HP on the table, but do the stock cats overheat if the stock midpipe is left in place?