Mike, I'm going to ask a really dumb question...why would we need or want another 4" of shock travel? Is this a rock crawler thing? It seems to me that there is so little travel in my springs already, I don't even know how they could give more. As for shocks, in my experience shocks with these stiff springs seem to be all but completely unnecessary. I've driven on worn out shocks and can barely (if at all) discern any difference after replacement. I'm sure there must be some need that I am overlooking here.