and there is a supporting rib in the center of the stack.<<

"Harley, Ageless Wings" wrote:

Lynn, Paul. et al...

 Is that a supporting rib, or the dividing wall that goes back to the engine

with two ports at each pipe?  Not knowing the engine, it's hard to tell from
the picture.

Harley

The engine has one port for two exhaust valves. Four valve engine.

Paul Lamar
 
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