Louvers

JC Whitney used to carry them. Dunno if they're still available, but they used to have a choice between aluminum or ABS plastic rear window louvers. Them, or maybe even Carparts.com might have 'em.

IMO, louvers look better on the earlier models ('79 to '86) because of the different quarter-window design. The older models had sort of a louver-styled thing going on, too, so it all kinda ties together. Plus, rear window louvers were all the rage back in that era, so it would look age-specific on those (along with white-letter sidewalls and phone-dial rims). On an '88 GT ... welllllll ... I don't think it'd look horrible, but maybe not quite as cohesive. Depends on what kinda wing you're running behind it, too.

I like them too. There is a guy in my area with a very nice black 90 GT with them. It looks really sharp.

See http://store.cal-mustang.com/showdetl-7-8966-28-0.html

some more pics and info from an old thread... http://forums.stangnet.com/showthread.php?t=519320