Exciting news for racing enthusiasts from The National Auto Sport Association (NASA) this week… on February 1, 2012 a new class ‘Spec Z’ was announced for 2003-2008 Nissan 350Zs! Nissan Motorsports (Nismo) has teamed with the series to provide limited aftermarket modifications allowed in the class such as Nismo exhaust, Nismo KW suspension, sway bars, LSD, and other bits. The engine will be restricted to stock down to the air box, and the tires are restricted to 275/35R18 BFGoodrich g-Force™ R1™ (or T/A™ KDW under wet conditions). 03-04 350Zs must weigh 3100 pounds, 05-06 must weigh 3175, and 07-08 must weigh 3300. Horsepower is restricted to 258whp (Dynojet) for 03-04, 265whp for 05-06, and 275whp for 07-08 350Z’s. There will be regional and national competitions as well as a contingency program.

Source: http://www.nasaproracing.com/2012/02/nasa-announces-new-nissan-spec.html
Rules: http://www.nasaproracing.com/rules/spec_z/NASA_SZrules_2012.pdf