I didn't notice any difference. What made a difference to me was the HID projector mod. Since the headlight "flickers" to oncoming traffic they notice it better.
It's also not "legal" in the US, but I doubt many cops will pull you over for it. Of course my city isn't a good indicator on that. They didn't pull me and busa over the other day for going just "slightly" over the speed limit... Just smiled and waved.
On a side note, on a long down slope like a bridge, you can hit 141mph. Not related to my previous comment at all. :ban: