IMPORTANT NOTE
The use of very stiff or hard tie rod bushes on both side of the subframe bracket is most definitely NOT recommended.

Use the hard poly bush (often marked Minispares) on the outside only and the soft rubber bush on the inner side. This is to prevent the tie rod end shearing off through over-stressing when tightening up the retaining nut to achieve the required seating of the retaining washer against the step on the tie rod. These harder bushes on the outside are more than sufficien to create the increased stability desired. The tyre trying to drag the tie rod back through the subframe mainly causes the instability, therefore only the outer bushes requires increased resilience. (Usually, the bigger the tyre, the bigger the problem)

Fitting harder bushes on both sides does not noticeably improve stability, nor improve performance.

Importation rules regarding vehicles are very specific: Only those over 25 years in age may be brought in to the USA without compilance to Federal Motor Vehicle Safety Standards (FMVSS).