
Thanks to Howard Stern coming across adjacent cars stuck in traffic, the newer recievers have a very weak FM transmitter so you'll need to remove the radio and get one of those direct FM antenna device ($20 from Radio Shack) that fits between the car's antenna and radio.
If I had it all to do over again I would have made the plate exactly 7" long and about 4.25" high. I can see a small gap between the plate and silver trim piece.
Here's some photos on how I built the bracket.
http://s222.photobucket.com/albums/dd14 ... at/Subaru/