This is a replacement front motor mount for middle year MK2's ('87-'90). Also known as the "flying saucer" rubber mount.
It is a bolt on replacement for the late hydraulic front mounts. Available both at a lower cost that the hydro mount, it also gives better performance and longer durability. There may be a slight increase in vibration when changing to this mount from the hydro version. *Fits Mk2 vehicle model years '87-'90.