The R35 GTR may parallel the 997 twin’s performance, but it is not without flaws. Tunability of such a complex and technologically advanced vehicle, is sure to be in question for the first owners of this new breed of Skylines. Sources in japan say that the GTR can be set to a track mode to remove the top speed limiter when at the racetrack. However should you skip the mandatory post race $1k service at a Nissan Performance Center the factory warranty is void. As if that wasn’t enough simple modifications like a different set of wheels will throw a code due to a wheel speed sensor in each of the facotry rims.