Okay so last year I bought a '13 gt with a lethal X pipe on it. Now the previous owner left the cats and H pipe in the trunk. Well yesterday I took it in for an emissions test and it failed the visual. Now my question is if am putting on the stock H pipe and cats on today do I need a returne or not? I only have to drive like 4 miles in total to get retested then off comes the stock stuff and back goes the X pipe. I no longer have the tuner cause someone else liked it better then I did and stole it from me the last time I was at the track. Thanks
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