Where'd you get that trunk sub/box? I'm running with the stock 1000 subs right now that sound alright, but they could be better.
Hey sorry for the late reply.
Its made by MTX. Its called the MTX Thunderform found here Thunderform Series FMUST05 | Ford - Mustang 2005-2012 | MTX Audio
I recommend going with the unloaded version meaning with no subwoofer, just the enclosure. The MTX subs arent that good, you can put a much better 12" sub in there like a Kicker CVR or Alpine Type R.
MAC Stainless axle backs & Prochamber
JLT CAI w/ SCT tuner
CDC Classic Chin Spoiler, TruFiber GTS4 Hood
Aeroform Sport Bar (in red to match the interior)
Eibach Pro Springs, 20" Shelby CS69 wheels
SoS Triple pillar gauge pod w/ Aeroforce Interceptor gauges
GT-CS Side scoops
FRPP 4.10 Gears/ FRPP Hot Rod cam