I've got a B13, but used this:
http://www.sr20-forum.com/200sx-se-r/32739-b14-aftermarket-exhaust-kit-system-choices-direct-bolt.html
When you start clicking the links, you can change from B14, to B13, to P-whatever. Most of the information in that link will then be applicable to your ride. It helped me a bunch on picking out my exhaust components.
Once I got the components and parts, my mechanic
bolted it on, fiddled with it a bit to get it right, and it has been excellent ever since.