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Upgrading Speakers for Non-Bose B6/B7 Audi A4 – Nick's Car Blog
A4 B6 Avant Full install. FOCAL, HERTZ | Audi-Sport.net
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AUDI A4 AVANT B6 B7 NEW STEALTH UPGRADE SUB ENCLOSURE BOX SOUND BASS SPEAKER | eBay
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Audizine Forums
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Custom anyone have a subwoofer box for the cubby hole for sale for a b6 sedan - AudiForums.com
a4mods.com :: - The Premiere Audi A4 Modification Guide and Pictures Library
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How to Remove Subwoofer and Amp (Avant) - Audi A4 S4 RS4 - B6 B7 - 2001-2008 - TOTAL TECHNIK - YouTube
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FBaudi04 Audi A4 B5 Avant Fit-Box subwoofer enclosure
