I have Eibach prog springs and tokico blues. When I got the springs I needed to call MSA to find out witch ones were for the front since they looked just the same. Before that a friend sold me the the MSA springs and we could not tell also the difference front or back we intall them anyhow and the car did not ride well it wonder on the road. all these spring the hight was the same and looked the same, well Eibach were different on the coils. to me it was easy to make the mistake to put the rear at front. The MSA has stikers that fall off. That is why I bought Eibach I was tired of the guessing game.