Hello, I bought one Tein HR hilo with non Tein Spring...I go for service all these absorber (that cost me 700 bucks), and the result, I drive my car like riding horse...It is soooooo tough. I ask any one pro bout this, and almost they say that I have to change the spring. (besides, the current springs were not mounted properly, so it make my absorber a little bit noise). BUT, I do not know what spring I'm goin to choose. Any one could help???