I hate paying aircraft or Harley part prices for basically car parts.

Does anyone have access to Kohler Generator Parts? I have learned that I need a:

(These are just prices I pulled off the web, they seem to be 25% less than what's being offered now).

"Critical grade" silencer part number 255333 $358.02

18" collector pipe that mounts to the exhaust manifold and directly to the silencer. $142.24

This is the one that gets me. The gasket between the exhaust manifold and pipe is $19.56 for a $3.00 gasket. Part number 276124.
It appears a drain hole was never installed so it's half full of water.

This is at least 65% quieter than it was now that I went to an electric fan, now I need to replace the exhaust.