As says in title I just picked up my 99 GTP, and I'd like to o a few tastefull mods. It is my daily driver, I have the fast car in the garage so nothing crazy. I was referred to ZZ performance and was thinking about going with there pcm and was wondering what is the smallest pully I can safely get away with as long as I have a tuned pcm? Supporting mods will be cai, plugs, wires, and ill be replacing that part of the exhaust where the O2 is mounted and its all small or whatever. Any advice would be great and thanks!

Also can anyone tell me how much boost they produce in stock trim and how many lbs each pully equates too?