this car is a joke. anybody who needs so many computer gadgets in their car doesn't need so much power, and vice versa. it's for people with too much money, no skill, and no taste.

Quote from Gabkicks :

LOL, i was just talking to a guy who's on the waiting list for a GTR... i wonder if he knows this.

lol the power restrictions are only for Japan. In regards to modifications, you wouldnt want to modify the car anyways as warranty will become void, the same with every other manucfacturer.
But if you really want to modify the car, there are ways around, but this should done after warranty or you just dont care and lastly a track only r35 gtr.