This will come across as smart ass-y, but I mean it with the utmost of sincerity.....ride that bike a thousand miles, and it will tell you what it needs. Or your butt will.
You have a valid concern about advice and opinions on internet forums. We have some people that can not fathom that someone could buy or try something different than they have invested their buck or time in. For some, transferring a motorcycle title into their name brings with it phenomenal mechanical insights and riding skills, that some of us, the lessor developed of the species, gain through wearing out tires and trial and error wrenching. On that note, I'm one of those who believes that the modest gains one might realize from going to after market exhausts and air boxes is offset by problems and constant need for tweaking.
If I ever found a 20% increase in usable performance, you'd have to spray repellent on those items to keep me away from them. I've taken some bikes that were "improved" at a time the owners wallet was fatter. When the world went on "lean", and the bike was a pain in the ass to even run to the Post Office, let alone around the world, the bikes were converted back to stock for reliability. Some of these "problems" are due to the after market component selected for the upgrade, some is attributed to the installation. We have some meticulous tinkerers in our midst that find peace, love and understanding through their upgrades, and I believe their experience is real and valid. It just isn't real consistent across the board out there, meaning these upgrades don't work well for everyone. The rider at 600 foot elevation isn't going to need the modifications that might benefit a rider at 7500 feet elevation. Dropping a number of Benjamin's to experience a 1.148% increase in appreciable performance........sorry, I can't get on board with this one.
Welcome to this forum. I hope you'll find open mindedness and support in what ever it is you want to do to your bike. This is not the forum that labels parts or procedures as "wrong". We may end up setting next to you in the jail cell, saying "I think I saw this coming", but we won't tell you or anyone else they "can't".
“many a trip continues long after movement in time and space have ceased”- Steinbeck, [I]"Travels with Charlie"
[FONT="Century Gothic"][I]Sometimes your only available transportation is a leap of faith[/I] [/FONT]