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2018 VW GTI SE Ep.188: Installing the Helix Subwoofer Kit - YouTube
Original Volkswagen VW Helix Plug & Play Soundsystem - Subwoofer inkl. Codierung
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2018 VW GTI SE Ep.188: Installing the Helix Subwoofer Kit - YouTube
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Tutorial: How-To Fit Helix Soundbox + Spare in GTI | GOLFMK7 - VW GTI MKVII Forum / VW Golf R Forum / VW Golf MKVII Forum
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