I have seen louvers in general as a pain because Most block rear view. Most, if not all, above will do this.
Fiero already have problems w/ that, like have problems backing out of parking space at a store or view
left right side traffic at some intersections.
Notchies have a huge blind spot, GT w/o "windows" in rear clip are even worse for this
Then you have to mess w/ them every time you need to open the rear deck for many above.
Louvers can interfere w/ cooling the Fiero engine bay. Air flow behind rear window does a good job a sucking hot air from vent covers. Unlike most, I've actually done some real testing to see how hot engine bay temp when cars is moving. Driving just even a few MPH and the temp drops to about same as weather temp.
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Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)The Ogre's Fiero Cave (It's also at the top and bottom of every forum page...)
[This message has been edited by theogre (edited 09-06-2015).]