It's got a wackerengines aluminum muffler on it. More of an exhaust diverter. Pretty free-flowing and loud.

I had a 16-10 APC on it and got the same RPM.

I'm going to just fly it for a couple gallons and hope it breaks in. Kinda late to reassemble the weed eater and trim the lawn with it for a season. I threw the rest of the weed eater in the trash.