I don't recommend NT-01 for street use. The sidewall is marked "FOR COMPETITION ONLY". The tread design is very poor for rain due to very large shoulder blocks and very few grooves.NT-01 seems a good choice, besides for he got a short distance work.
NT-01's are find on the track in light rain, but will hydroplane on city streets/freeways with any significant water coverage. They also will not have much longevity due to the soft compound. If you want to use NT-01's on the track, get a second set of wheels.
If your buddy has never been on the track, he's better off with street tires. For a number of reasons, I would not advise moving up to this level of grip until he has significant track experience. There are several posts that talk about track days for newbies.