That's what it sounds like. Subwoofer mod. First mod. I have the box and subs in a .DAE already, have a look. Now I need to do the rest, which I have no clue. I need it to be in-game, as well as sitting in each official car in the trunk/bed, with 2 versions, one that plays Darude-Sandstorm at full, or Gabe's music when you press (M for Music). It will be like a part you add to the car, like a turbo, except subs pop in the trunk. I don't know to keep going, some help would be vastly appreciated.
I've been trying out a few things. It's still in the modelling stage, and eine I'm not really good at modeling, I think I might just try only jbeam, since I'm sort of competent at that (well more than modeling)