By the way the car is a "stock" genesis GT2. A little bit more modified than the GTR that nissan runs in the RING.
First of all, slick tires, different suspension set up since its the Japanese version (europe and the US can only dream about being the same) and the well known higher boost trick.
You can flame me all you want but its the truth!!!!!!!!!!. None of the magazines or car manufacturers buying a stock "unmodified" GTR were able to get NISSAN's claim time. So the difference against this modified "genesis GT2" is just which car has the most modifications, since they both have them.
If the GTR is so freaking fast why doesn't one tuner modify it and beat the genesis time???????????. Because they can't.