As for sound, it's not as loud as I was hoping, but I have no idea what it sounds like outside the car from the back. I know it a low, deep sound from inside the car but not at all loud.
2013 Chevy Cruze LT
2003 Pontiac Vibe GT
1993 Pontiac Grand Am
Even though I have a Gen2 2016, I'm pretty sure we have literally the same motor so it should sound the same? I have a resonator and muffler delete that goes into a Y pipe.
Here's how mine sounds, let me know if this would be too loud or not