Not if you consider 1 or 2 HP a noticeable gain close to redline! Since I get 4 car mags monthly and read them cover to cover some cars get reasonable gains with aftermarket intakes (if you believe them) just not our G35s. In fact if you get a pop charger with the pretty polished aluminum finish in hot weather it will cost you 10 to 20 rwhp due to heat soak.
Gary