The 2 pc poly bushings can be pressed in much easier (can be done with a vise) than the metal cased rubber counter parts (ie meyle HD, oem's). IMO, these may not reduce ride quality significantly, but they will transmit road noise/vibration as poly bushings do.

Just out of curiosity, why not just do the whole arm? The febi arms are decent replacements, at a reasonable cost, with the added bonus of a new ball joint and much simpler install!

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