Yes, since 2007.
Yes, since 2007.
Yes, since 2007.
No they do not.
Cars did not get catalytic converters until 74. Trucks were 81, or 82.
Yes
For state inspectons if the vehicle came with a catalytic converter it must have one one it to pass the visual inspection to receive the state inspection sticker. that is Texas state law.
Yes
YesYes
Yes, if it came from the factory with a converter.
Catalytic converters do not rattle. If it does it will need to be replaced as it may block the exhaust. Loose heat shield?
Crawl under your Kia and count them.
Catalytic converters are failing and need replacement.
Catalytic Converters are required in every state and city in the United States including American Fork, Utah. It is illegal to remove them.
There are no differences. High flow catalytic converters are not really high flow; the catalytic converters you have on your vehicle are as high flow as you need them to be. A "high" flow converter will either be of a larger diameter, or the inside is made in such a way that there is less restriction to exhaust flow.