They have the urethane bushings now and they have according to the original owner 30000 mi. or soon them. I do have the urethane ones to replace them with, since the car will only see 4 or 5 opentrack events a year and no street time. I know the Delrin would be much better, but for me I think that would be over kill, since I'm not a very aggressive driver anyway. Ya, I've been told to check the welds very closely, since there have been some problems reported in those areas. Thanks alot for your help!!