In my opinion, intakes are simply for vroooom sound. I think gains are negligible. I question those people that claim a "noticeable" difference in 3-5 hp.
I don't like the way Injen looks (personal preference). I would rather get black powder coated fujita since I like the way it looks.
If you don't care for the whoosh or vroom sound from your engine, just leave your intake alone. I have intakes on 2 of my Infinitis (09 G37 and 06 FX35) and the only thing I noticed was the vroom. On my FX35, I even think I lost low end power by introducing an intake and a plenum spacer, but it sounds bad a**!
