" They can't undo it " ……. I think " They WON'T undo it "…… Think about it - If the Computer " parameters " can't be changed or adjusted then really what Monster Fuel did for your Spyder …." DIDN'T HAPPEN " …......… And if it can't be changed then they haven't changed yours to be crappy ….. doesn't make any sense to me …… good luck …. This reminds of what soooooooooooo many dealers have said " we can't find ANY codes in the computer system "..... total - BS - …...…...…. everything that occurs in or to your Spyder - registers in the computer … how do you think they can tell you what rev range you've been using ????? Mike