yeh i was looking into them but the box in the middle seemed like a big catchment for the air, more edges for it to hit screws up the flow...
thats why u never buy those flexi-expandable hose things for your intake just makes it worse.

i ended up buying the APEXi one because it seems to be the least restrictive (shortest pipe), even tho the air wont be cooler. atleast it doesnt have to suck harder, which is a problem with CAI's