As far as I'm aware, if the cut outs are at the bottom corners of the bumper, they are brake ducts. If it is the cut outs above where the license plate should be, it will give more airflow and cooler air into your CAI. Not sure if it does anything noticeably dramatic. But you will indeed have cool air come in and possibly cool your engine a little more since you have to cut the styrophone. Probably have a good gap in there
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