Pre 1976 used 8 of these bushes for the trunnions on the rear subframe but from (MK4)1976 on Rover reduced the quantity to 4 and used 2 larger bushes 21A2560 on the new front trunnions 21A2558MS.
Mini spares product.In 1976 Rover started fitting this larger metal trunnion to the front of the rear subframe which only used one single large bush 21A2560. 2 required per car but sold singly