I have heard in person. Cargraphic, AWE, Bypass, PSE, Gundo Hack, and GMG.

On a scale of quiet to loud it would go

PSE
Cargraphic
Gundo
AWE
GMG-full system 200 Cel cats
Bypass's

In terms of sound, AWE and GMG are similar and offer a crisp cup like sound-with cats, Gundo and Cargraphic are both throaty, PSE is raspy unless you upgrade the headers and cats too, Bypass's are just LOUD LOUD LOUD.

Jason

 

There is a Loud/Racing version of AWE, which is not mentioned in the website I have heard it, sounds amazing! And it's LOUD!

 

I found the thread interesting but it was primarily relating 997.1 series I think. I was wondering if anyone had performed a comparison for 997.2 cars? I am in the market for a new exhaust and trying to define the best option for me.

 

I was doing some searching and came across NHP exhaust made by Maxspeed Motor Sports. Does anyone know anything about them? They have a flex portion included. Here is the link to there website.
maxspeed-motorsports.com/997nhpmufflers.html

 

here's a couple of links

https://www.6speedonline.com/forums/...p-exhaust.html

http://911car.blogspot.com/2009/07/p...e-exhaust.html

 

Love my FVD (loud/export version)

Very refined sound, about as loud as you can get without resonance or boom in the cabin. And the build quality is incredible.

German made heavy gauge stainless steel and press formed case.

And they installed it for me no charge (and right next to a 959)

dr