I recently bought a set of Tein dampers with the edfc. A cpople of days later my rear passenger strut came seriously loose. I got it tightened and everything is fine. Like two weeks later it is loose again. I have no idea what is wrong. If you have any ideas please lets hear them. By the way, these dampers are the best thing i have bought for my car yet. The car handles great.

 

Sometimes the nuts and bolts need to be tightened to a certain spec, however if it is just one piece that keeps coming loose and everything else is staying fine you might have a defective damper. Call Tein's tech service if you haven't already. Chances are they will tell you to check all the stock suspension parts (bushings, control arms, etc.) to make sure that nothing is bent back there and if everything is fine they will probably have you send back that shock.