This is kinda funny, but ive owned Third Gen Camaro's for quite some time now, and couldnt tell you the answer to this question. Ive looked at pics on here, and the Net and still cant tell. Are the "rear quarter", and "rear bumper" ground f/x on the Z28, and RS the same, or do they differ in design? I feel like an idiot, but for the life of me i couldnt tell you.

 

The rear bumpers on the Camaro's with gfx were different, there were 3 styles; 82-84, 85-90, and 91-92. All three gfx were different. Neither one will really match up with a rear bumper with a different style, i.e. 82-84 quarter gfx won't really look right with 85-90 or 91-92 bumpers, and whatnot. It's best to keep the whole gfx package the same style IMO.