I purchased the full Akrapovic Evolution exhaust cat-back system from Scott at Vivid Racing. Awesome customer service and really worked with me; had some issues because of the size of the packages and shipping to a military APO address, but everything arrived quickly and in one piece.
The whole installation was easy and Akrapovic included things like multiple tubes of copper lead-free anti-seize paste, detailed instructions, excellent packaging, and great quality pipes. Everything was definitely lighter than the OEM exhaust, unfortunately I didn't get a chance to weigh it and compare.
As for the sound, it is one of the quieter systems. I'll try to get a vid up of just the cat-back and then with high flow cats, which I will get in about a week.
The pics below were taken before I straightened everything and tightened all the bolts.
