Taking out and/or replacing structural crash components to gain 5hp is not smart (incredibly stupid, but I'm trying to be nice). You could lighten the car if you remove all the body panels. One could also get better cabin airflow if you cut holes in the firewall. That doesn't mean you should do it. Use your head, be safe, and leave your bumper alone.
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2013 Cadillac V-Wagon, RIP Z
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