they come with the z28 turbo kit from American Sports Car Design, they're the fins or whatever they're called on the hatch back, I was just wondering there was any place you could purchase them without buying the whole kit.

 

They are called louvers, they aren't part of the kit, they came stock on some Camaros and Firebirds, you can get aftermarket ones or find some on ebay even. Just do a search.

 

unforgivin is correct. They came in 3 different versions I believe. 1 piece(all abs) 1 piece(all metal) and 3 piece(sides abs and middle metal) Lots of places sells them.

 

They were made in every variety you can possibly imagine in aluminum and plastic, and no matter which ones you use they'll scratch the hatch glass, rattle, and most likely eventually they'll fly off the car while you're driving down the highway.

Not cool.