Dealership or trdpart4u. I was going to order from Energy Suspension, but recent knowledge about polyurethane has me going back to rubber.
Im interested to know as well. I know that with poly you will feel more bumps, jolts, etc. but it lasts longer. I noticed the difference from rubber to poly on my steering rack bushings.
Actually, they don't last longer. They will also deform quite rapidly. I do some road racing and we found that the poly u bushings we've used have literally crumbled within 2 years (you could take your finger and tear off a chunk). After a year, the bushings were ovalized. With rubber bushings (aftermarket and OEM), we found that they last longer. The Poly U was stiffer, but that went away quick. As always, YMMV.
Ahh good to know. Makes sense in a way I guess it depends on the application. I think poly is outdated anyways in terms of other materials in the category. The rubber lasts pretty damn good as seen in my steering rack 8 years of abuse is good to ask of a rubber product left open to the elements. I know a couple guys that road race and they are split between rubber and poly.
I don't have any poly, but I have heard they SQUEEEEAK a lot too. Energy Suspension actually sells some sway bar bushings with zerks so you can keep greasing them to knock down the noise. Read many threads here about people *****ing about squeaky body mount bushings on their lifts.