Amazon.com: Dual 12" Sub Box Ported Vented Subwoofer Enclosure MDF Car Audio Stereo System : Electronics
BLACK 12" DUAL COMPETITION PORTED SUB BOX
Qpower Qbfordff09208 8 Inch Dual Port Subwoofer Enclosure Box With Underseat Down Fire For Ford F150 Super Crew And Ford F250 And 350 Super Duty : Target