I just received my under dash sub enclosure for my 2013 RZR XP4. The first one I received didn’t fit because it was too big. It was an older model that didn’t work with power steering. My comp kicker sub fit fine in the old one.

The new one is tapered and the subwoofer doesn’t fit. Should I grind the inside lip of the enclosure so the sub will fit. Is this normal?