The later Minis (those after 1976) have a single bolt at the top of the front subframe to attach it to the body. Between the subframe and the body the factory installs a thick piece of rubber to isolate noise and vibration. This it does but it also can cause the whole thing to be a little vague and imprecise. After time this rubber also degrade to a point where it is can be downright unsafe. Replacing these rubber slabs with a high qualty 'Poly' bush is critical for any of us with hard driving in mind but should also be considered even for the casual user as they will last much longer than the rubber version!