I also find it interesting that in the most high performance version of this engine, (used on the Nismo 380RS) they use the exact same stock air boxes. I think if an intake really performed better a) Nismo would know best, and b) they would be all over it. Also, let me remind you, Nismo makes similar intakes for these engines, and they are no where to be found on the most expensive high performance variant of this motor.....
EDIT: Actually, after looking into this again, it looks like they switched to a cone style intake in a CF "suction" box, but in the stock locations on the 380RS-C, along with a Motec, and new plenum....
