Originally Posted by green-ghost

I had louvers on the back and sides of my mustang and the visibility was a little diminished but not terrible. The thing that sucked was the rattle at highway speeds. As far as radio, wouldnt plastic be ok?

I googled and emailed the people at spoilers for less asking them about the possibility of creating rear louvers out of ABS plastic

Window Louvers

there are many companies that come up on a search