Front door speaker change Golf MK5 8" Kit - YouTube
VW CC Passat B6 B7 R36 Upgrade Speaker – SOUMATRIX
VW Golf MK5 2003 - 2009 Kicker 17cm Front Door Speaker Upgrade Kit | eBay
Blade ICE - VW Golf MK5 speaker retrofit from Gladen Audio. This kit also works in Porsche 911's. ONE 200 Golf 5 Plug & Play 3-way System for VW 25 mm silk