Hi, GUY's... just got a quick question about this ford racing mass air meter. there's a little scuff mark on the the bottom of the air housing about 2 by 2 inches long does anyone know what this does or is for? i thought maybe it was when the air hits it it might create a vortex of air threw the meter into the throttlebody.. i duno...just a thought?? any feed back would be really awsome....!!!!! thank you stRip