[woodyracing]

what about cars without air boxes?

I removed my air box and fitted a PiperCross free flow induction (cone shaped) filter. These are unrestictive and allow the air intake to suck up much more air, and the shape is designed to have a large surface area and promote, even increase air flow speed.
The problem with these type though, is that they suck up the hot heat from the engine bay. This can partly be fixed by adding an air induction pipe (like a brake duct) from the front of the car.
I had an idea to make an air box, covered in heat shield material, and have a cold air induction pipe which would feed my cone filter with cold air, and keep the air cool in the air box.
Seems K&N are addressing the heat problem in their new 57i kits, with a plastic heat shield - i think a fully covered box with intake tube would have been better.

anyway these are more design ideas.