I have the real deal cop shit lying around here that I was going to install on my Infiniti G20 back in the day (To pull people over at night, muhahahaha). I tried selling it but there was no interest, if you want I can sell em to you for dirt cheap. Anyways, heres the old post I made;
This kit comes with a SPS660 60 Watt Strobe Power Supplie, four clear Whelen Pop-in Hide-a-way strobe tubes, and four 15 foot Whelen Strobe cables. There are nine different strobe patterens and all you will need besides this kit are on/off switches and a button for strobe pattern selection. The Strobe Power Supplie is a little smaller than a Dream Cast and can handle up to six strobe lights. This is a REAL strobe light kit, not the cheap ones you find for $10 at Pep Boys. It can be seen in day light, rain, snow, or whatever.
Here is a link to pix of the strobe light kit and an M3 using them:
http://www.imagestation.com/album/?id=4291049795