The Victory had a Stage 1 kit ,air filter, pipes, and some other mods so I am told...No real proof except I rode the Victory Vision for over 3 years with the same mods and in and no way would it run with my F6B that has Cobra pipes and K&N filter...Just saying!!...Have a friend that has a Vision with cams, pipes, timing gear, high intake filters, and I know he cannot beat me, but it is closer than a stocker...Any stock Victory Vision can blow the doors off any HD ...I have done so many times with the one I had.....