NISSMO

Official specs on the Nissan GT-R: 473 hp - AutoSpies Auto News
... The 573HP is for the Nissmo V-Spec-III track model which Nissan is bringing out
next year to compete with the V8 performace vehicles such as: M3 CLS, IS-F, AMG ...
http://www.autospies.com/news/Official-specs-on-the-Nissan-GT-R-473-hp-21866/