The car is a 2004 BMW M3 that has had a HPF Stage 3 kit installed in it. The car currently makes 755 whp on the dyno. Should be enough to push around a bit of extra weight from the audio gear. Here is a video of the car on the dyno.
YouTube - Rich's HPF Stage 3 M3 Turbo w/755rwhp by HorsepowerFreaks
The car will be getting a Hybrid Audio Technologies L841-3 Pro set LEGATIA L841-3 PRO COMPONENT SPEAKERS SET . It consistst of a 8.5" midbass driver, a 4.65" midrange and the L1 Pro tweeter. There will be an Image Dynamics IDMAX12 for sub duty and all drivers will be powered by Zapco DC Reference amps. Head unit is a color and texture matched Denon 8250ti.
The L841-3 Pro set will be going in the front doors with the L4 in the furthest forward part of the door. Tweeter placement is undecided at this point.
The work on the doors has begun: