Bktrub@aol.com wrote:

I'm drawing up some plans for the tangential exhaust- I'll get them off to
Lamar in the snail mail. In order to address the problem of metal fatigue,
I'm beefing up some of the pieces to act as gussets, so the whole thing will
be supported by the exhaust flange where it bolts to the engine. I think that
it is imperitive to make it out of iconel.
BrianTrubee
Redmond, WA

Bad idea Brian. It is a sledge hammer approach. 

You are attempting to cantilever the weight of the muffler and down pipes 
from the  exhaust flange and that is were the pipes are the hottest and weakest.  

Support the weight of the muffler with 
straps to the engine and let the pipes expand and contract a bit.

Paul Lamar
 
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