I wouldn't be driving it hard without a retune done on it mate, a lot of money's worth of engine to spend if she goes pop just for the sake of a retune Russ
I pay $980 a year with GIO, max no claim bonus, I'm 26 and driving a FG XR6 Turbo. I do have a few other things insured with them like house, contents, rental house and so on. I think the multi policy discount is the way to go. Russ