I have the Stealthbox and it comes with the 13w6v2. Just be warned though if you continue to utilize your stock Shaker 500 door subwoofers... They are phased weird and will cause cancellation issues with your trunk sub!
Here are my build photos from the original mockup...
http://i423.photobucket.com/albums/p...ake999/Amp.jpg http://i423.photobucket.com/albums/p...ke999/Pic1.jpg http://i423.photobucket.com/albums/p...ke999/Pic2.jpg http://i423.photobucket.com/albums/p...ke999/Pic3.jpg http://i423.photobucket.com/albums/p...ke999/Pic4.jpg
Unfortunately, my setup is totally different now and about to change again
ETA: I am getting ready to pull the Shaker 500 subs and replace them with some Mach5 Audio MLI-65s after building the appropriate baffles. I am also going to use some Alpine tweeters in the 6x8 door location and take my system 3 way active
ETA2: The Stealthbox was my THIRD subwoofer in this Mustang. Prior to it I had a pair of JL Audio 10w3v2s each in .75 cubic foot sealed and I didn't like them. Next I had a 12" Solobaric L5, and while it was loud, it didn't sound very "musical". The Stealthbox, while not as loud as the L5, sounds WAY better and plays way deeper than the L5 and the 10w3v2s did!