Trying to find a new or aftermarket rear bumper for a 1991 Z28. I cant find any. Hawks has new/aftrmkt 85-90. Is there any difference in appearance and/or how they fit? Wonder if there is a difference in how the ground effects attach.

I believe they do look different. Remember that 91 had a whole new ground effects kit, and I think that carried over to the rear bumper.

They have appearance differences. The 91-92 cars have a small lip that extends on the bottom while the 85-90 are smooth.

Hope that helps you..