I was in the self help tips but did not see how and if I can install my own stage 1 kit and what parts I need to do it. I did read that an aftermarket air filter can be better than the one HD gives you if they do the work. What is the adjustable fuel thing that you can get for future upgrades. The dealer said I should get that at the time of the install. I do not need a dyno after a staie 1 do I. Man so much to learn, but its fun, and I don't golf of fish. Thanks