Both work well you just need to get air that is colder than the engine bay into it. Come to think of it beeza and I made a ghetto air intake for my car, ill have to post it up soon.

WHale penis is good becuase of the material they are made of doesnt heat up anywhere near as much as metal which i have. Get cold air into that sucker if you want performance, throw it in anyway if you want better sound.