Just an update on these.. I've been researching them and they seem to be legit and pretty reasonably priced as well. Going to look into them a bit further and then decide if I'm going to use them or not. I am not really sure I like that they are Nitride coated in just the "head" and not the entire valve (from what I've read on (
Eng-Tips Forums) We'll see. I'll know more in about a week