pray that you never have to remove this on your shovelhead. it was a pain right in the ass. the previous owner had about a gallon of red loctite on there.
what makes it suck even harder is that you shouldn't use an impact wrench on it. you could mess up your bearings or your flywheels (maybe) or throw the magnets off the rotor. instead you use a jambar and a lot of patience and strength.
if you do happen to feel like taking that damned nut off, check out this link first. a guy named hawg ryder explains how to make your own jambar. hawg's jambar.