Pontiac GTO 2004-2006 - Intake exhaust and Nitrous

I have a 2004 M6 and I was thinking about setting up my car with pacesetter headers slp loud mouth exhaust k&n intake and a NX nitrous kit with a tune of course. Just wondering about opinions on this and and pros and cons. Also what kind of HP numbers do you think I can expect at the wheels only doing a 100 shot and if there are any other things that anyone would recommend anything else.

ive pretty much got that same set-up( SLP LT's, LM1, AEM CAI), not including the nitrous. im hopefuly going to be spraying a 125 wet shot by the end of june. Im hoping the stock clutch holds up long enough to last till next spring. If you beat me to it, let me know how it goes. Good luck with the pacesetter headers. Ive read they may still have issues.