This is a harness made specifically by Technic PNP to allow you to add an amp to the factory radio. Short version is, it works fine. It can be as clean of an install as you want, meaning you can just tie into the factory wiring or run new wires for the speakers. If youre partial to the factory headunit, but want an amp, this is the best way i found and it was easy to install 
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Last edited by Kcalhoun27; 08-24-2022, 04:02 PM. -
Pm'd.2003 E46 M3 TiAg/Cinnamon 6MT
2005 E46 330i ZHP Imola/Sand
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