Hey guys, I am about to order rear shocks for my truck and am a little confused when i'm on slr's website. For the bilsteins, I want shocks that are 20% stiffer and made for the SL.

Now when I called them they told me I wanted item # BL5-10, but it just seems like they are the stock stiffness and why is it so much cheeper than the other bils? Can anyone help me out on this?

-Chris