I bought my F6B last January so I've had right at a year. It came w/ the Mustang seat with passenger backrest. The backrest is not attached to the seat and doesn't appear to be a Mustang backrest. It was attached with the rear luggage rack and it looked good but i'm not riding 2-up. PM me and I'll send you some picks' if you'd like to see it. I'd sell it to you, I just got a new Ultimate seat. The Mustang wasn't for me.