![How to install an aftermarket Head Unit on an A4 with stock Bose amp/speakers/sub - AudiWorld Forums How to install an aftermarket Head Unit on an A4 with stock Bose amp/speakers/sub - AudiWorld Forums](https://cimg8.ibsrv.net/gimg/www.audiworld.com-vbulletin/2000x1124_1/20150924_190733_7edeb7575a2cce66ba24f482c00e35e1f407095f.jpg)
How to install an aftermarket Head Unit on an A4 with stock Bose amp/speakers/sub - AudiWorld Forums
![EVO PRO AUDI A4 B9 premium in car entertainment options A4 B9 - In Car Entertainment and Projector Lights Pro Installer EVO PRO AUDI A4 B9 premium in car entertainment options A4 B9 - In Car Entertainment and Projector Lights Pro Installer](http://www.evo-blr.com/wp-content/uploads/2018/09/2016-Audi-A4-interior-press-shots-1030x616.jpg)
EVO PRO AUDI A4 B9 premium in car entertainment options A4 B9 - In Car Entertainment and Projector Lights Pro Installer
![Amazon.com: Aftermarket Radio Stereo Installation Double Din Dash Kit Mount Trim Bezel Compatible with Audi A4 and RS4 Select Models with Bose System : Electronics Amazon.com: Aftermarket Radio Stereo Installation Double Din Dash Kit Mount Trim Bezel Compatible with Audi A4 and RS4 Select Models with Bose System : Electronics](https://m.media-amazon.com/images/I/41TCx+oWbSL._AC_UF894,1000_QL80_.jpg)
Amazon.com: Aftermarket Radio Stereo Installation Double Din Dash Kit Mount Trim Bezel Compatible with Audi A4 and RS4 Select Models with Bose System : Electronics
![Car Stereo Upgrade for Audi A4 (Incl S4) 2001-2008 (B6-B7) Single DIN, ISO, Analogue - PPA Car Audio Car Stereo Upgrade for Audi A4 (Incl S4) 2001-2008 (B6-B7) Single DIN, ISO, Analogue - PPA Car Audio](https://ppacaraudio.com.au/wp-content/uploads/2020/07/PPA-Stereo-Upgrade-To-suit-Audi-A4-Incl-S4-2001-2008-B6-B7.png)