I'm running the Taitec Gtlw exhaust on my car and wanted a louder exhaust note so i put a set of test pipes on. I cant believe how loud the car is now. Its 10x louder. I did the same on my S2000 and many other cars since i live in Fl and there are no tests. None of my cars ever got as loud as this. There is no drone but its crazy loud. The cats seemed very restrictive by the diameter of the pipe inside. I'm going to try and dyno it again to see what difference it has made