Jason n' Dman, yeah it does sound really good! My choices came down to two. Devil & Blue Flame, the BF was a little cheaper than the Devil.
The BF was also louder than I expected but not too loud as to get the cops attention to pull you over. I really like the low rumble on idle and @ low rpms, it gives you a very solid throaty sound maybe similar to the Devil and when you wack it up 7-9k, it screams without the tin can sound. The finish and look of the carbon is very nice, it shows the depth of the pattern which also resembles the M4 carbon that i saw in a local Cycle Gear shop.