Genuine metal trunnion to hold the 2-2A5818MS bushes on the rear subframe. Originally there were 4 of these on the subframe but in 1976 the front 2 brackets were strenghened and enlarged to
21A2558 trunnion which took one large single bush
21A2560.
These fit to the car with the short bolt part towards the bottom of the car at the front, and towards the front of the car at the rear. They are off set, so fitting them wrong will cause problems when fitting the subframe.