Hey Greg!
Looks gggrrr88888!
(That's a G8 thing for you FORD geeks!)
It will get slightly louder over the next 10K or so... My 09'G8 has gotten louder.
Brick was really quiet at first (under 2K) with my axle back Magnaflows & stock tips. At around 20K I added NESHO's Mid-pipe x-pipe, that replaces the stock 3rd cat & mid-muffler. It is somewhat louder, but does have a "sour" spot around 1,800 RPM where it becomes noticeable. Otherwise it is relatively quiet. What was interesting, is that the boost levels, with a 3-bar MAPv sensor actually showed a 1-1.5 boost gain with the NESHO mid-pipe! Whether that relates to a real world performance gain.... is still "up in the air." SO FAR.. I'M USING A "SLOW TRACK"- HAVE HAD 90 DEG TEMPS, AND WHEN IT'S COOL - 100% HUMIDITY... NOT TO MENTION MY BAADDD. DRIVING.
I SUX...