I've had the Flowmaster Axelbacks on for over a year... the sound definitely has to mature, as they sound better and better over time. In fact, most of the compliments I've been getting have changed from how cool the car looks to how good it sounds (of course there weren't as many on the road when I bought mine two years ago). The mufflers do drone below 2000 RPM, but much less with a tune - just that little bit of extra horsepower makes the difference. Good luck with yours, I think you'll be pleased.