Quote:
Originally Posted by steve99
If you concerned about effecting you warantee then don't get headers or mess with the cats or o2 sensor positions. The dealer will spot that in about 10 seconds, and as soon as you do any of that your putting your engine warante at risk.
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To an extent yes. I think they can more easily deny claims and deny many more things if the ECU is flashed versus just replacing the header.