which engine do you have?

Theres a box on the pass side of engine compartment held on with 4 clips. Undo the clips and your filters in the box.

Why would anyone want to have there engine suck up excessively hot air from the engine compartment? Is it not better to have cooler, cleaner air from outside the vehicle? Obviously, if an engine sucks more air, it's also sucking in more dirt (not so good for oil and engine).
Why not just remove the exhaust system too........that'll give you about 10-15 % more hp!!!!!!