1st Gen. 1 Series (2004-2013 | E81, E82, E87, E88)
Hi all, I am looking into upgrading the audio in my E87 with base audio. My goal is to swap the four 4-inch speakers with good aftermarket ones and to get the most out of them I want to swap the Business HU with an aftermarket 1-DIN head unit (doesn't matter too much which one). My car has a...