How do you figure? They merely make the total height of the solid bushes the same as the old polyurathane bushes which happen to be supplied at a length that fits perfectly on the car. I guess I could chuck the solid ones away and put the poly ones back in, then there is no problem at all but as I understand it solid ones improve handling. Alternatively I can make a set from scratch that would also fit perfectly, which I probably should have done in the first place instead of being lazy and getting store bought ones.