A friend of mine traded me what we assume to be OEM LS6 springs, but we are having doubts after looking at them. I'll get a pic up tonight, but for now all I have is a description:

These are Natural colored springs, unlike the full colored yellow/blue or orange stripe LS6 springs. They also have a yellow and blue stripe on the top 2-3 coils.

Generally springs have ONE color stripe, but these have two. There has got to be a better way for manufacturers to mark their springs!