Have you ever checked out an old muscle car and noticed those black plastic slats on the rear window? Here's why so many cars had them back in the day.

Window louvers had aesthetic and practical uses, including reducing heat buildup in the days before air conditioning became widespread in cars.

The large rear-window louver is designed so that it will not interfere with opening your trunk lid. Note that this set of louvers will not fit Camaro models sold after the 2015 model year.

Cruising town in a Bolt-powered IROC Camaro, cranking Jock Jams, doing brake stands, and generally being just a total embarrassment.

We love the iconic Chevy Camaro Z/28 IROC-Z, but is this 1980s muscle car really collectible enough to justify its recent sale prices of over $50,000?

The Chevy Camaro IROC-Z could be had with a detuned Corvette L98. This Bright Blue example will cross the Mecum Auctions block at their Florida Summer Special.