Okay. So all 3 are in my price range....ES being the cheapest. Has anyone ran at least 2 of these brands and can tell me whether one was better or not? I'm not worried about the vibrations. All 4 of my previous cars had ES bushings. Just wondering for the rear diff since mines blown out now for a while. Which would you recommend for track racing. Everyone seems to love the whitelines. Anyone use the SPL solid bushing? Pretty sure all 3 brands will break after the car is gone