This cover is a factory designed item and is a lot thicker. Yes you might break a fin off, but you would knock a hole through them both with about the same effort.
BTW, I just tested it harder than most of you rock crawler guys ever will. Ask Dan(spalind) or Robert(fastdrmr), they have both rode and know how hard I blast through everything. I am racing the clock over some of the roughest stuff you could imagine. I don't plan on driving it to work on Monday!