Fit my 06 ZX3 despite some sights not including my year model in the application guide.This is the forward most bushing on the rear trailing arm. It's the main pivot on the chassis and a fairly large bushing. As pictured it came with plenty of grease.My brother and I fought with the old, rubber, bonded bushing that was in the trailing arm for a while. Trying to cut it out, was slow and we didn't want to damage the housing or the pin that goes through the bushing.Eventually we just hit it with a torch and burned it out; which worked great!Results: Its hard to notice a difference but those particular bushings were not bad on my car. Although, I do know that when put under excessive weight, the OEM rubber tends to give a lot, which will through your alignment off. Theoretically, the polyurethane will help with this.