I didn't get a vid with just the Akrapovic exhaust. I just installed the Berk High Flow Cats today and it totally changed the sound....its a little raspy....I took a quick two vids today after the install, I would've took more time but the weather here has been crap.
370z Akrapovic CBE w/ Berk HFCs - YouTube
370Z Akrapovic exhaust w/ Berk HFCs - YouTube
Sorry couldn't figure out how to embed.