http://www.flowmastermufflers.com/cgi-bin/flowmaster/super40.html?id=CI7tL7UH so they came out Dec 1st.... does anyone have these mufflers yet? they are supposed to be a better flowing and better sounding 40 series mufflers...im pretty sure that im gonna be buying these soon... but am wondering if anyone has sound clips of them on your 99+ GT?any noticable power gains? dyno runs? thanx