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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Audi A3 - Retrofit
09-13 AUDI A3 QUATTRO BOSE REAR SUBWOOFER SUB WOOFER BOOM BOX SPEAKER UNIT OEM | eBay
Audi A3 - 8" Fit-Box Subwoofer Enclosure 8L
dizzythedog.com
Basser - AUDI A3
Audi A3 - Custom Stealth Sub Install (Pictures Included) - AudiForums.com
Audi A3 FWD Underfloor Sub Box (2006-2013)
AUDI A3 8V 2013 - Install Subwoofer - YouTube
FBaudi02 Audi A3 8P Fit-Box subwoofer enclosure
For Audi A3 8L Subwoofer Housing for 20 CM 8 Inch Woofer Space-Saving Boot 4047442079382 | eBay