Thistle, why not just drill a port equal in size to the factory exhaust on the clutch side of the muffler in front of the existing deflector. Then buy a 288 or 281 deflector and attach it with self tappers. It will cost you about $20 and a 1/2 hour of your time and you'll have a factory looking dual port.
Oooof. I hadnt thought of that.That's perfect! THANKS!!
The factory one a well-known North Cali saw builder is selling has identical factory ports,one on each side of muffler.I've only seen a handful of factory dual ports,less than 10 in a lot of years time. Still too high priced IMO,even for a rare OEM part that was discontinued years ago.
Gonna look for the deflector now,buy it if available,then wait to drill the port AFTER it arrives,just in case.
Do I need an extra screen/spark arrester also? Existing muffler still has one I believe.