Actually, I don't seem to remeber any specific mention of a Vulcan religion. I know they have a vague spirituality, but that might be based around the Katra principle, or their unique way of having their mind downloadable (as we've seen a few times, Spock's Brain unfortunately being the first).
An out-of-body based meditation system based very loosely on Bhuddism. But there's actually something that happens based on their unique brains, not a soul just in some way, a conciousness that can be scooped up and moved out of it's container in an actual, physical (rather icky) way.
Which I don't think counts.