Auto Racing: Sodium filled valves, sarasota florida, consistent success

Question
Looking for a source of Sodium filled valves with a stem size of .4685.  Most I have found are in the .547+ range.  Also looking for valve guide seals for same.
Any ideas?

Answer
Hey Doug:

Wow , that's a 12 mm valve stem !  Don't drop one on your toe !!  

I would start looking with Goodson Machine Shop Supply (www.goodson.com)  then try Ferrea Racing Valves. (www.ferrea.com ) Of course there are a few others, but they are two of the biggest that I know of.  They are both honorable companies that I have used in the past with consistent success.

In the case of Ferrea, I know that they will make custom orders, but you should have your wallet real ready for a shock.

If you don't have any luck, write back in a day or two and I'll put it to a pro engine builder nearby. He has a goldmine of sources that I don't know about .

Good luck

Dan Liddy
Sarasota, Florida