FK452's will be fine, i managed a 9:12 lap on them a couple of years ago.
Set of lowering springs, some decent discs/pads and a good service and you're pretty much sorted for your first trip. Remap with a sportscat will help a bit, but the Ring is definitely not a power circuit.
But more important than all of the above - do a trackday in the UK so you have a feel for the limits of your car, and learn as much about the layout of the Ring as possible. Watching youtube clips will help, you don't want to go round on your first map needing a map!
