It's sounds really good. At Idle, Low RPMs and cruising speed you can't even tell it's there. That's a plus for me. if you have the windows down and you give it a little gas without engaging the SC, you get a small chirp/whistle with change in intake air velocity.

Now, if you have ever heard a Terminator ('03 - '04) Cobra,it sounds a lot like that. You can clearly hear the Super Charger whine when under load. You get a nice understated whine when giving it part throttle, just enough for those around you to know there is something to it. Now when you put you foot in it, she SCREAMS in a good way. If you can imagine what a Jet Engine, or Turbine sounds like when its first starting up, it sounds like that. I wish I had a way to record it for you. So, basically its nice and civilized when you need it to be and a BEAST when you want it to be.