I hate the term "stage kits". Nothing says I compromised like saying I got stage this instead of stage that. If you like the idea of stages of performance you've been brainwashed. Those are price points not stages. "I got the thousand dollar performance kit" doesn't sound as cool though does it.
Well I don't do stages, I will sell you a kit though. My kits are based off of builds I have done and know work. You don't get to pick what is in it, but you do get to pick what your budget is. I know not everyone can afford a $10,000 120" race motor-so you will find options. Sportster, Dyna, Bagger, Softail, doesn't matter I have a kit for most price ranges if you are serious about performance.