8 1/4" wide Mirror with mirror mount.
If mirror mount is already installed, this mirror should fit on the original mount.
If there is no mirror mount on the windshield you can epoxy the mount that comes with the mirror to your windshield. Epoxy can be purchase a any hardware store. Let epoxy dry for as long as possible before you mount the mirror. Many two part epoxy brands say they dry completely in 24 hours, try to double or triple the time to dry.