M.A.P Audio & Customs - Custom made fiberglass 8" subwoofer enclosure for an audi a3 8v. This was hand made with mdf rings and support braces. It was then fiberglass and covered
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2006 Audi A3 Trunk Subwoofer Speaker Box 8P4035382 | eBay
Basser - FBaudi03 Audi A3 8P Sportback Fit-Box subwoofer enclosure