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Subwoofer Box – Mark Customs
JL Audio Stealthbox® (Black) Custom-fit fiberglass enclosure with one 10" 10TW3-D4 subwoofer — fits 2012-up Ford Focus 5-door hatchback models at Crutchfield
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InB&O Full Speakers Upgrade. | Fiesta ST Forums
How to install a subwoofer in a Ford Fiesta ST - YouTube
