I have a set of edge jammer 3 nozzles that I bought and never installed because I heard after I bought them they were crap. I have a friend that wants to run them in his truck are they really that bad? I have a pop tester at work so its no problem installing them. Also out of curiousity if you are runnning jammer nozzles what pressure did you set them at? I know they are suppose to be set at 310 BAR (IIRC) just curious if you tried different pressures.