MAXX RS4 said:So then, if I only have 4 cats (2 precats and 2 regular) then my h-pipe obviously isn't stock..?
hazze4ya said:thats why i took the one off my 98 it had 6 cats,car didnt know how to act with the off-road x pipe,we here in missouri only have obd inspections with mils its a breeze,car stunk like fuel while the girl was scanning it.
bdcardinal said:i believe it wasa mid year 1999 change. i have seen 99 stangs with 6 cats and 99 stangs with 4 cats.
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