Called injen and found out that they just started producing the SP1990P and SP1990BLK just for the Nismo model because of the Air/Fuel ratios & tuning. The Base model 370z ecu tune is very different. They DO NOT recommend using *an aftermarket intake for the base model 370z on a nismo 370z without a tune*.
I just ordered one from
www.z34performanceparts.com . hopefully I'll have it in a week or so.
2010 Nissan Nismo 370z Injen SP1990P SP1990BLK +13 whp R&D Dyno Session2 on Vimeo