BSW needs either a Z4 or X3 to develop their upgrade for these cars. They are located in Glendale, here are the details:

Click here to enlarge Originally Posted by Bavarian Sound Works
First to respond to will receive a free front soundstange upgrade to their Z4 or X3.

Here’s what we need:

1. 1 full business day for installation/testing/auditioning of beta drivers.
2. Upon delivery of production drivers (6-8 weeks later), we’ll need the car again for a full business day to install the new speakers, which are of course yours to keep.

We’re located in Glendale off of Los Feliz Blvd and Interstate 5. I look forward to working with you soon!