my car is pretty freaking low, and i scrape my cat all the time, but it's never been really bad. but the other day, i was going out of a parking lot and scrape it and could feel it pull the cat a little bit. now whenever i drive for a while, and then turn off my car, it ticks and it definitely sounds like it's coming from where the cat is. is this something i should be concerned about? (stock exhaust btw).