will this help performance at all?

[samuraivince]

hey everyone, this is my first time posting. i noticed a body kit for the LB that had a small retangle cut in the front bumper part, right in front of our air filter box. i also saw the same retangle cut in a body kit for a Nissan 350z also right by the filter. i was wondering if this cut alone could add any performance on a N/A stock yaris?? or what would even happen if we took a roto-drill and made a cut through the bumper like that to allow more air to the intake? thanks!