Amplifier Rack
The ONLY thing I really hate about this car - no spare tire well! This is a big change over a 330. The folks at BMW decided to locate the exhaust where the spare tire should be, and instead gave us a fancy can of fix-a-flat.

So as you can see - not much to work with - forcing me to go with your standard sub box.
Here's a look at how the 4 Art Series Amps fit.

A little more progress:
