So I've had my downpipe on for about a month now, at first it wasn't really noticeable, a little more gurgle when I started it, and nothing I could hear over my SC when going WOT, but now my car is bubbling and popping quite nicely when I let it engine brake in first and such, I was just wondering if it took some time for the new cat to get broken in, or is something wrong with mine, in a good way?