The bushings in my 4 link look similar to the ones in the front end of Oz's long bar on the new rear set. Street Lynx GAVE me a set of new bushings stating that in the time frame I bought it (07-08) They had a supplier that used "powder metal"??? their words exactly. I could not tell the difference looking at the old and new. I will see if I can take a pic of the ones that failed so you guys can see what happened.