wel if you got the stock intake and tube on with the setup you got then i would think so definetly. With h/c/i in you should really be starving your motor with the stock stuff. A CAI would bring it a 12.9 i think. just M.O.
........i doubt youll see a difference you can get a C&L or Pro-M mass air.........that would be better then the stock mass air but the airbox as long as you take the silencer out it should be bout the same....u can always get a powerpipe though =d
I've seen the flow numbers on the stock box vs. the cai, and they are nearly identical. I have not seen the numbers on sticking the maf in the fenderwell as they are doing now, it might me worth looking into.