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What makes the poly bushings bind over spherical or Polyurethane?
Poly bushings are polyurethane, if the arm has them on both sides they dont articulate at all cause they bind up against the torque box which isnt good. A spherical bushing os a heim joint it can moove freely without binding.
Over stock there really aren't any control arms on the market that you will loose handling over, the only negative control arms are ones with poly bushings on both ends as they will bind, other than that no control will hurt your handling over stock.
The lack of articulation IS what hurts cornering, so indeed are aftermarket arms that will hurt handling. I think you know this, so figure you just didn't articulate yourself well
Get it....? we are talking about rear-axle articulation and figured you didn't articulate yourself well..?