I leave @ 4.30 am every day, so the Magnapacks weren't in my future, but I wish my GTB's were a little louder
all I can say is quiet - or at least "more refined" (@ least from the cockpit even w the top down)(all stock incl. the H-pipe). The stock GT's had a bit of a pop and a hollower sound, these are deeper and smoother, and don't pop @ all.....maybe due to the resonated tips? So, a catted X-pipe or the splice in one is going on the Xmas list - nice sound, but a lil disappointed in the lack of increase in volume - actually, kinda bummed.