Finally put a sub in my ext lbz. Couldn't take it anymore. I looked high and low for a reasonable priced custom box but they cost more then I wanted to spend. I stumbled across the kicker 46TL7T102-3. It fits perfect under the ext cab seats. It's a 10" L7 sub. Figure I'd share as I surfed the web for weeks trying to find something that wasn't a $400 custom enclosure that could pop right out if need be. Doesn't sound bad for the small sealed in closure.