Will a 99+ (M2) bar work with an older Miata equipped with a Robbins Top glass rear window?
YES – the glass window in the Robbin’s Top just barely fits even though the OEM glass in the ’99 is a bit smaller. Your only option then is to install a Hard Bar. It can accommodate any top with a glass rear window. Another option if you do have a ’90-’97(M1) Miata and want a roll bar and a top with a glass rear window, you can do it by replacing you current top with a ’99+(M2) Factory top, frame and window. It fits the older models perfectly.