Thanks, I appreciate the info. I will order just the o-rings. My springs appear to be in good shape, so I'll just re-use them. I had the dealer install the pipes after I got them, and I think they used the stockers. It's so expensive to have the work done that I want to start learning to do the basic mods myself. That's money that could be spent on parts! This forum has tons of useful info and is very helpful, thanks again.