You have a point. Loudness depends on who builds it, but the cat-back assembly that I have (That's straight pipe plus a free flow resonator, not just a straight pipe) is not too loud at all. Except for a meaner sounding growl at startup, it wasn't very loud at all. Then once you step on it, it really starts to growl but it still isn't really much louder than stock, just meaner. I guess to really appreciate it, you have to hear it.