Pioneer TS-SW2002D2 8-inch Shallow-Mount Subwoofer with 600 Watts Max Power
This sub is a direct replacement for a 2013-2014 wrangler factory sub-  holes line up to factory holes and the factory sub grill fits over the new sub. Looks stock when finished. Good idea to use some sound dampening material such as polyfill inside the factory box. Better sound than the cheapy stock.