change oil, oil filter, spark plugs and gaped to 0.8mm, fuel filter, all fan belts, timing belt, top up fluids, air filter, change gearbox oil + diff oil, check timing and addvance it if u like, flash ur cooling system, break pads, check disks for wear.
thats all i can think of when i did a major service on my r32 gts-t when it came from japan. hope that helps u. u might want to do sum of the service urself coz if u take it sumwhere it will cost u $$$$
cheers
bill