Hello guys this is my first thread and am new to passion ford. I have a series 2 ERST. I want to modify my front bumper to improve airflow through my front mount ic and rad, but am not sure how to do it, I can cut it alright but how do I go about getting a nice curve shape so there's no jagged edges and not gaps on the inside where I've cut it. I look the look of twins front bumper on here. Just need a guide really and pictures.

Thanks, Ant