30%, you are half right.
Depends on what shocks you use. They will most likely fit over the shocks and be the right length but not all shocks are the same diameter. The upper and lower retainers may not fit the spring.
If you let us know what shocks you are using, someone will be able to answer your question as to whether they will fit properly on your shocks.
Sorry I forgot to close this thread. These springs went to the Pay it forward room were they where promptly snatched upand I just have to mail them out. I apoligize for any troubles. But to save you more troulbe X these springs are not stiffer by anymeans than the tmaxx ones. With your stock shocks you would have alot of trouble with these springs IMHO.