Anyone have one installed or the Force II? I'm looking at getting a 4" cat back system and am leaning towards Flowmaster. They don't have any sound clips (they just say the American Thunder is louder than the Force II). I don't want it really loud in the cab but I would like it somewhat louder than stock. I currently have a Diamond Eye and it is really loud inside above 2000rpm so whenever I'm going over 70mph. Wasn't there a guy on here that posted sound clips of various systems?