No ceramics or inconel.
I was advised to go for the "big-shaft" whatever that means. (could relate to the price in some way :)
By the way - I'm using an exhaust manifold made by xspower and sold on ebay for $99. I check it regularly. No signs of problems yet. Here are a few images of the components.

http://canardaviation.com/cozy/cz1012.jpg
http://canardaviation.com/cozy/cz1013.jpg
http://canardaviation.com/cozy/cz1015.jpg

John

Kelly Troyer wrote:

John,

   Another question or two.........Does your TO4 have anything exotic

such as inconel exhaust turbine or ceramic bearings , etc ??.........

--
Kelly Troyer
"Dyke Delta"_13B ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifold