I second this, but there is nothing wrong with getting a GTR front bar for your GTT, side skirts or rear bar for that matter. Just don't bother going for the whole Nismo Z-Tune look as this is exclusive to the GTR body so although you can certainly do it, it will not look good. But at the end of the day, if you want to still do it, then by all means go ahead as it is your car. Do what you want to do to it and don't worry about what people say.