It sounds great. But I also have 3" down pipes. It's not as loud as F.I. 18" CF + HFC's, but I am starting to like the mild notes in the lower RPM's, which F.I. doesn't have. I drove a local guy's Z yesterday that had HFC + F.I. and it was loud and aggressive, I kind of appreciate the AAM now.
Here is a link to the exhaust note. You may have to fast forward it a bit