I've got straight pipes to stock muffler and I'd say that the car doesn't sound like a muscle car. It's quiet. The sound it does make is like water bubbles popping. Soft and squishy. For contrast, I just took off the Borla exhaust and resonator that were on the car when I bought it used. That was a terrible racket. It vibrated the car enough to make the interior rattle, it droned like crazy at 20000-2400RPM, and it sounded more muscley but in an aggressive noise kind of way. Not a smooth loud roar. I took out a decibel meter and it showed 100 dB with the borla, and is low 80s (1/4 as loud) with the straight pipe to stock muffler. That's just road noise and wind.