5th Feb 2020, 21:51

Removed the "cats" on my 96 Impala SS and it ran just fine.

6th Feb 2020, 16:19

Talking about the car on review that has engine technology that dates back to 1991, so yes this particular car will run fine if not better without the converters. I had a Panther car that I removed them. No problems at all. A modern car built in the last 10 years? Yes it would more than likely run like crap.

If you are concerned about untreated exhaust and the atmosphere; try telling that to the 19 states across the US that don't require an emissions test. Evidently they could care less. Also what about the cars built before 1975 that are still on the road?

And of course a car will instantaneously fail a test without converters. That was the whole point of the second paragraph in the previous comment.