Quote:
Originally Posted by mcfe
That is a terrible advice. Polyurethane inserts will INCREASE vibrations. What is important here is the hardness of the rubber, for which the Shore scale exists.
Poly is hard nearly as bad as just having a lump of metal instead of rubber.
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these inserts are not like full poly bushes they just stop the slop in the worn existing rubber bushes and dont make vibration any worse they just take up the slack without going to the expense or total replacement subframe bushes . watch the vid to understand the process
it was just an option the op could consider.