No disrespect, but I do believe that you have left out comfort soft tires and the fact that the car MUST and I mean MUST have 0 miles for it to be at it's best. Also there is a glitch that if you put any chrome color on your GTR it makes it about a half car faster. Another thing, changing the color on your rims adds weight to the car so make sure not to do that. I would know because this is the exact set-up I use on my fastest GTR...