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
Speaker & Subwoofer Enclosures for Cars for Audi for sale | eBay
Subwoofer box A3 8P 2011 | Audi-Sport.net
Basser - FBaudi02 Audi A3 8P Fit-Box subwoofer enclosure