Title says a lot of it. I wanna buy someones sideskirts, but he says they are different.

 

The S5 turbo is the only S5 that came with side skirts.

The GXL (any year or version) did not come with side skirts.

 

I thought my 91 NA had some, but ok. thanks.

 

Not from the factory it didn't.

Perhaps aftermarket

 

Mazda finishline offered 2 different types of sideskirts, front lip, areo pieces, rear spoilers, and other ground effects pieces. They "less beefy" one was standard on the 89-91 Turbo IIs.

The "spoiler extention" is still available I believe, but I'd buy the replica sideskirts & front lip from www.fc3s.org as the OEM ones are limited quantity/excessively expensive.