I have to get new exhaust for the S. I let someone take it up the street yesterday. When she got on it, the car sounded like it had a mix between a hole in the muffler, and nuts/bolts rattling around in the pipes. I cant find anything on power number for the three. I like the way the WS2 looks and sounds. Everyone and their brother has the Invidia here where I live. The hks is really expensive but im not sure of how much better, if at all, it is than the other two. Plus the hks and invida remind me of cheap universal mufflers. But I would like to know power numbers if anyone has them.

EDIT: has anyone heard any good or bad about the neuspeed exhaust? It looks alright but I've never heard anything about them.