| Have you ever dealt with bushings before. I replaced all the bushings in the rear end all at once with ES bushings and it took a full day. The hardest parts of the job are removing and reinstalling the bushings them selves. There is a write up on here some where in the faq on it. As far as my opinion. I would do everything I could all at the same time so you don't have any failures in the future. Es bushings are a little stiffer than OEM and you'll get a little more road noise and maybe some whining out of the rear end but well worth it in my opinion. And to answer the question. ES or OEM. Collars are just band-aids so you don't have to drop the sub-frame.
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