What's an "ITB equipment car"?
As far as air filtration, the three cars exhibit these characteristics
black car: ITG foam filters. Air is filtered
orange car: Screen. Leaves, large pebbles are filtered; better than nothing
yellow car: No air filtration. Set up for show.
If it's a question of what type to use, something along the lines of the factory or ITG filter is suggested (even K&N). There is hardly any additional power gain from removing the air filter and plenty of potential drawbacks. They mostly center around ingesting non-compressible objects into the engine for immediate "wear" and gradual, but accelerated wear in long-term use.
http://www.itgairfilters.com/megaflow_multi.asp
Sherwood
no affiliation