Just an FYI for anyone rebuilding an M30 head... So far I haven't been able to locate anything other than stock valves, called Korman, BMP, VAC, and visited with local "builders". Lots of choices for hotter springs and various cams available but no one sells lighter/stronger valves. Which is good I guess, says something about stock parts.

Local guy charges $44/$45 for exhaust/intake valves, and that was a "special" deal for me because he's such a nice guy. BMA has them for half that!

I'm thinking of cutting down the part of the valve guide that hangs into the throttle throat like a big brass tonsil. I don't suppose anyone has any experience with that? BMW usually does things for a reason I assume, so maybe it's needed for stability. The guy at Korman (not Ray, a guy in sales) was pretty confident it was just fine. Sure looks like a major obstruction in the airway though.

- Robin