Lower end torgue? No
Higher temp air? No
Water? Yes, if you submerge the filter
Better than the Z-Tube? No
Since you already have the Z-tube spend that $300 elsewhere. Sways are a good choice.

 

I've had the Injen CAI on my car for 2 years now and never had a problem once.... First of all you deserve to blow ur engine if u decide to drive into water deep enough to reach that filter you just have to be smart about it....secondly maybe the numbers may not show it but i felt a boost in power at higher rpms....before i installed the intake i felt as if the car lost power around 5500 - 6000 rpms (03-04 coupes cause i know the 05 coupes are tuned differently)....with the intake its all out ***** to red line...Not to mention the amazing sound and the hissing noise when you switch gears....I've been asked so many times when i drive by people if my car has a turbo...everyone is open to their own opinion but in my opinion i love the intake

 

I really dont like the Z-Tube because most people say it doesnt do anything on its own. Maybe just a little noise, I really think CAI is the way to go with that.