Re: Polyurethane Bushings.... Are they worth it?
Poly bushings do squeek which gets annoying, and particularly if you have to dissasemble things to grease them. Other than that they work very well. TPR is another popular choice (thermo plastic rubber) but they do compress after time, unlike poly. Energy Suspension bushings; I have them on my SHO and they are neither poly or TPR; a little softer than poly but don't sqeek or compress.
2006 GC Overland QD II
5.7 Hemi, Modern Muscle 85 mm CNC ported TB, Apexi super voltage stabilizer, Billet Tech. Catch Can, Koni FSD shocks/struts, SRT8 sway bars, Cooper Discoverer SRX 255/65/17, Amsoil fluids, Diablosport Intune CMR tuned by Hemifever tuning.