Helix Plug & Play Sound System/Subwoofer 000051419B Original VW | eBay
Genuine Volkswagen Audi - 000051419B - Spare Tire Mount Subwoofer Retrofit Kit (000 051 419 B)
Installed a spare tire subwoofer in my GTI : r/GolfGTI
VW Retrofit LTD - Golf MK7 TDI upgraded with Helix subwoofer kit. 2h ish job including fitting and programming sound parameters. Quite good results from such a small box 😊 | Facebook
Fender Subwoofer Question | GOLFMK7 - VW GTI MKVII Forum / VW Golf R Forum / VW Golf MKVII Forum