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.
i agree with the mtx setup it fits and looks great. i went with the loaded one and it failed rite after the 1 year manu warranty ended. I ended up putting a jl audio 12 in the box an put a jl amp on the back of the seat in the trunk and im so happy with it. 2005 V6 Pictures - 2005 V6 Photos - Mustang Picture Gallery - AllFordMustangs.com
2005 v6-14.8 1/4
Performance Mods~Mac Dual Exhaust with shorty ceramic headers, K&N typhoon CAI, SCT3 with 93 Brenspeed tune, BBK 70mm TB, Screamin Demon coil, JBA wires, Drilled and Slotted Rotors. J&M rear lower control arms
Visual Mods~ 17" boss rims on nittos 255/45's, clear front turn signals, chrome upper billet grille, window louvers, shaker500 w/ jlaudio 12" sub an amp in the trunk for some thump. kenwood excelon kdc-x396 deck