I have an '03 Heritage with, 95" stage ll, 203's, Pro-pipe, and A V&H Fuel PAK. I'm having my heads ported and I'm changing my cam to a TW31G. So I called V&H for a new map. They call me back and said they no plans on supporting any stage ll mod's. I replied back saying their head Tech "Bruce", indicated when I bought the stupid thing they would support any of my future mods. All this Tech could say was "sorry". That's a fine how-do-you-do! Now I'm left high and dry. So for anybody considering the V&H Fuel Pak, "RUN,DON'T WALK, RUN", don't believe a thing those incompetent people have to say. Love their pipe...hate their service!