Yes you have to trim that spring back about 5-6" I just trimmed min off with a cut off wheel on a small angle grinder I used my SS springs too but I wanted to lower my car so I took the spring pak apart and now only run the main and the second leafs in my car it works awesome and the car has a nice stance I think Mickey Thompson Drag radials 295/55R15 launch's good and hard ..... I will be taking it to the track in the spring.