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Rockford Fosgate T2D2-15 Subwoofer installed on David Aitchison's Ford Focus ST on Wheelwell
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Ford Focus ZX3/ZX5 2000-2007 ThunderForm Custom Amplified Subwoofer Enclosure MTX Audio
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Ford Focus RS '17 Subwoofer - YouTube
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Ford Focus ZX3/ZX5 2000-2007 ThunderForm Custom Subwoofer Enclosure | MTX Audio - Serious About Sound®
Stealth Ford Focus Subwoofer Enclosure
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2011-2012 FORD FOCUS SEDAN DUAL SUB BOX - Sound Off Audio, Inc.
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