I own a 2+2, and its just a regular G body rear seat, like a standard Grand Prix. There is a guy over on MonteSS.com who is installing new front and rear seats in his '86 Monte SS. He modified the rear seat from a 2001 Caddy Eldorado, which has a center armrest with flip out cupholders and short rear headrests, and he's installing front seats from a late model GTO. he has some photos posted of the install of the rear seat, and it looks amazing, but he admitted that it was alot of work, and ended up costing more than he thought it would cost. I don't think he's finsished the front seat install yet. I'm looking forward to seeing pics of the new front and rear seats installed.