High mileage isnt a problem as long as they've been looked after, i've got one of the uk spec cars with Nissan service history and its done 124,000 miles now and the only major engine work its ever had done was a headgasket at 110,000

I wish the box was as good as the engine though I'm on my 3rd gearbox in the last 2 1/2 years and thats running standard boost Just about to go to about 300 bhp Sods law says the box wont break now