Magnaflow only seem quiet when you are cruinsing (I like that though cause if I see a cop or don't wanna draw too much attention I just through it in a higher gear) but as the RPMs increase so does the sound. With the Magnapacks the sound is only amplified even more. Then again i think my car is quiet pulling into the neighborhood but everybody tells me they can hear me coming from way far away, I think like power, most everyone gets used to it over time and it doesn't seem like it's enough.