I have not tuned my p500 yet but am anxious to hear what the outcome is as I'm looking for more top end. I typically don't like touching stock. I feel the machine, though might be faster doesn't always run as nice. And if u do one mod u should really do the other 5 mods to go with it which gets expensive.
I may end up doing the chip, exhaust, and air but am just not sure it's worth it.