The biggest upgrades to the car seem to be weight savings mostly through carbon fiber parts and the deletion of the back seat. It also features overboost button for increased midrange boost during passing. No engine upgrade has been confirmed. As reported last month, in 2009 all GT-Rs will get five more horsepower, for a total of 485 — well, that’s official numbers.
It seems that although Nissan has pulled out of the January’s North American Auto Show in Detroit, it will use the GT-R Spec V to generate some news in its absence. The Spec V is expected to be officially revealed on January 8th, most likely in Japan.