Metal heats up the air :-D and the intake pipe isnt gonna let MUCH more air into it cause the mass air flow, but I have 1 on my na also didnt do much or anythnig at all noticable just made it look a bit better.
I have a set up you can get at 935motorsports it is actually a full on cold air setup. It relocates the filter outside the engine bay under the headlight. However I had to do minimal mod to make it all fit. Email me and I will send you pics for some reason I cant post pics. [email protected]