Stillen gen 3 exhaust
 

So it seems that after watching a couple videos (trying to find an installation video of this exhaust which i cant find to help as a guide) that this exhaust makes the car sound quieter and less aggresive?... it sure dose give it more power but is it true the engine will have less of a growl???

First, Gen 3 refers to the intakes, not the exhaust.

I can't speak for the actual sound, but as a general rule, unless the video was recording using higher quality sound equipment, exhausts sound very different in real life.

oops i meant intake and ya the video makers were revealing that the intake made the sound dimmer after installation