OK yes you have a point the others were track but what is so special on the aniversary riims
these wheels were introduced on the 2005 35th Anniversary 350Z. However, Anniversary owners were in for a shock when these came standard on the 2006 and 2007 models on the Base, Enthusiast, and Touring trim levels.
Need more info
http://www.350z-tech.com/zwiki/350Z_OEM_Wheel_Specifications