Re: Installed new Hellwig rear sway today
It has been said that poly would be "noisier" but most come with a synthetic lubricant that would minimize, if any, noise.
When I went with poly bushings on my front & rear sway bars on another car I own, there wasn't any increased noise levels. The poly bushings will keep it "flatter" in the corners as they do not have the flex typical rubber bushings have that are installed for comfort, not performance. Not sure that I really noticed much of a difference tbh.
2015 Granite Crystal Metallic Altitude