I just installed my PUSH upper pivot on my 5.5. What a difference. I was thinking it looked like a nice piece but at $120 it seemed it was just too much money. I then broke one of my lower pivot bolts. With that bolt broken I could see how much twist the upper pivot arms allowed. In my mind it looked like tying those pivot arms together would eliminate alot of the twisting force that goes through those bottom pivot bolts. I justified the purchase from a reliablitity standpoint more than handling. The PUSH link really tightens up the back end. It is very noticeable. We ride alot of sidehill cow trails and the difference is huge on anything off camber like that. The long bolt that I took out of the original pivot arms had a pretty decent bend in it as well. The PUSH pivot works as a sleeve supporting this bolt for most of it's distance. Reinforcing this bolt, combined with eliminating a large portion of twisting force should help extend the lifespan of both upper and lower pivot bolts, if not the handling difference is worth the price. I had a really hard time stepping up and paying $120 for that small part (eventhough it is beautifully made), but I am very glad I did.
Craig
Craig