Finn Lassen wrote:

And here I thought that one put a muffler on one's airplane for the sake
of the neighbors.

Well, I can confirm that the sound level in the cockpit is significantly
louder too, without a muffler.

A guy on the ground said it's not louder than a Lycoming with straight
pipes.

Due to space limitations I had to join the two headers close to the
ports (about 7 - 8 inches). The header pipes are 1.75" expanding into 2"
and continuing in a 2" stainless steel flex tubing out the bottom of the
cowling.

Finn

 
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