I saw it floating around but didn't get it because it doesn't have the three bolt flange on the end of the mid pipe. I just got a stock 96 900rr header.
Riquefied, I put the same header on my 9er. There is a link in the cbr900rr exhaust thread of who made a three bolt flange for me. It required welding in two places because I did not want to deal with the springs. I will post a link to the thread.
There is a slight difference. I would say a little less in the bottom but slightly better on the top. I run it without a PC3 so I am sure therre is more to be gained from it. I like the look and the lack of smell.