I have had my Magnaflow X-pipe with cats and the FR-500 catback on for a while now and have gotten used to the sounds it makes. Today I drove next to a stock 03 Cobra, it still had no license plates, and I could hear the gurgling noise it made as we slowed down. I now vaguely remember that my car did this also when it was new but, with my current exhaust, that noise is gone. Does anyone else have this gurgling noise when decelerating, stock or modified exhaust, and is it annoying?